Editing Williams Racing (section)

====2018–2019: Continued decline====
On 4 November 2017, [[Felipe Massa]] announced his decision to retire from F1.<ref>{{Cite news|url=https://www.bbc.co.uk/sport/formula1/41870426|title=Felipe Massa: Williams driver to retire at end of the season|date=4 November 2017|work=BBC Sport|access-date=5 November 2017|language=en-GB}}</ref> [[Renault in Formula One|Renault]] reserve driver and [[2016 GP2 Series]] 3rd-place finisher [[Sergey Sirotkin (racing driver)|Sergey Sirotkin]] was signed as his replacement for {{F1|2018}},<ref name="sir guy">{{cite web|last1=Barretto|first1=Lawrence|title=Sergey Sirotkin beats Robert Kubica to 2018 Williams F1 seat|url=https://www.autosport.com/f1/news/133914/sirotkin-announced-as-2018-williams-driver|website=autosport.com|access-date=16 January 2018|date=16 January 2018}}</ref> with [[Robert Kubica]] joining the team as a reserve and development driver.<ref name="Kubica">{{cite news|last1=Barretto|first1=Lawrence|title=Kubica named Williams' reserve driver|url=https://www.motorsport.com/f1/news/kubica-named-williams-reserve-driver-996292/|access-date=16 January 2018|work=[[Motorsport.com]]|publisher=[[Motorsport Network]]|date=16 January 2018}}</ref>

[[File:2018 Chinese Grand Prix Qualifying Sergey Sirotkin (40812182175).jpg|thumb|right|[[Sergey Sirotkin (racing driver)|Sergey Sirotkin]] driving the [[Williams FW41]] at the [[2018 Chinese Grand Prix]]]]
Williams struggled over the course of the 2018 season, scoring only 7 points and finishing last in the Constructors' Championship standings. Although the [[Williams FW41|FW41]] rarely suffered from reliability issues, it was significantly off the pace; the team's highest finish was Stroll's 8th-place finish in [[2018 Azerbaijan Grand Prix|Azerbaijan]]. The team's only other points finish was at the {{F1 GP|2018|Italian}}, with Stroll finishing 9th and Sirotkin scoring his first championship point in 10th. This was also the only Grand Prix of the season in which the team reached the third qualifying session, with Stroll starting 10th on the grid.

[[File:FIA F1 Austria 2019 Nr. 63 Russell 2.jpg|thumb|[[George Russell (racing driver)|George Russell]] at the [[2019 Austrian Grand Prix]]|left]]On 27 February 2018, [[Martini & Rossi|Martini]] announced that they would leave Williams and Formula One at the end of the 2018 season.<ref>{{cite web|last1=Barretto|first1=Lawrence|title=Martini and Williams to end sponsorship deal|url=https://www.motorsport.com/f1/news/martini-and-williams-to-end-sponsorship-deal-1009390/1393564/|access-date=27 February 2018|work=[[Motorsport.com]]|publisher=[[Motorsport Network]]|date=27 February 2018}}</ref>
On 12 October 2018, the team announced that reigning [[2018 Formula 2 Championship|Formula 2]] champion [[George Russell (racing driver)|George Russell]] would be joining the team for the {{F1|2019}} season. On 22 November 2018 it was announced that reserve driver [[Robert Kubica]] would be promoted to the other seat, marking his return to Formula One after eight years away from the sport due to injury.<ref>{{cite web|last=Collantine |first=Keith |url=https://www.racefans.net/2018/10/12/george-russell-handed-f1-debut-with-williams-in-2019/ |title=Russell handed F1 debut in place of Stroll at Williams for 2019 |publisher=RaceFans |date=12 October 2018 |access-date=12 October 2018}}</ref><ref>{{Cite news|url=https://www.bbc.co.uk/sport/formula1/46300009|title=Robert Kubica: Polish driver to make F1 comeback with Williams in 2019|date=22 November 2018|work=BBC Sport|access-date=22 November 2018|language=en-GB}}</ref> For the 2019 season, the team entered into a partnership with Polish petroleum company [[PKN Orlen]] and a multi-year title sponsorship arrangement with telecommunications company ROKiT.<ref>{{cite web|url=https://www.williamsf1.com/racing/news/2018/11/williams-martini-racing-and-pkn-orlen-announce-partnership|title=WILLIAMS MARTINI RACING and PKN ORLEN Announce Partnership|website=www.williamsf1.com|access-date=30 November 2018|archive-date=29 November 2018|archive-url=https://web.archive.org/web/20181129183947/https://www.williamsf1.com/racing/news/2018/11/williams-martini-racing-and-pkn-orlen-announce-partnership|url-status=dead}}</ref><ref>{{cite web |url=https://www.williamsf1.com/racing/news/2019/02/rokit-enters-formula-one-as-title-partner-of-williams-racing |title=ROKiT Enters Formula One as Title Partner of Williams Racing |publisher=Williams Racing |date=11 February 2019 |access-date=11 February 2019 |archive-date=12 February 2019 |archive-url=https://web.archive.org/web/20190212011732/https://www.williamsf1.com/racing/news/2019/02/rokit-enters-formula-one-as-title-partner-of-williams-racing |url-status=dead }}</ref>

Williams missed the first two-and-a-half days of pre-season testing in [[Circuit de Barcelona-Catalunya|Barcelona]] due to the [[Williams FW42|FW42]] not yet being ready, the only team to suffer such a setback.<ref>{{cite web|url=https://www.bbc.co.uk/sport/formula1/47308080|title=Formula 1 testing 2019: Williams describe delayed start to testing as 'embarrassing'|website=bbc.co.uk|date=20 February 2019|access-date=21 May 2020}}</ref> Williams began the season out of reach from being competitive. During qualifying at the season-opener in [[2019 Australian Grand Prix|Australia]], their fastest time was almost 1.3 seconds slower than the nearest competitor. In the race, Russell and Kubica finished two and three laps behind the leader respectively. The team's best result of the season came in [[2019 German Grand Prix|Germany]], where Kubica was classified 10th, the team's only points finish that season. However, this result only came after post-race penalties for other drivers. Upgrades came during the season with which the FW42 began to catch up to its competitors; Russell came within 0.1 seconds of reaching Q2 in qualifying for the {{F1 GP|2019|Hungarian}} and finished close to the points with 12th in [[2019 Brazilian Grand Prix|Brazil]]. However, both cars would be eliminated in Q1 at every race of the season. Despite the team's lack of performance in comparison to 2014–2017, it was confirmed that Williams have extended their engine supplier partnership with Mercedes until 2025.<ref name="auto">{{cite news |last1=Horton |first1=Phillip |title=Williams extends Mercedes F1 power unit deal through 2025 |url=https://motorsportweek.com/news/id/24415 |access-date=13 September 2019 |work=motorsportweek.com |publisher=Motorsport Media Services Ltd |date=13 September 2019 |archive-date=21 September 2019 |archive-url=https://web.archive.org/web/20190921211835/https://motorsportweek.com/news/id/24415 |url-status=dead }}</ref>

On 19 September 2019, Williams announced that Kubica had decided to leave the team at the end of the 2019 season; he would go on to join [[Alfa Romeo in Formula One|Alfa Romeo]] as a reserve driver.<ref>{{cite web |url=https://www.williamsf1.com/racing/news/2019/09/robert-kubica-to-leave-rokit-williams-racing-at-end-of-2019-season |title=Robert Kubica Decides To Leave ROKiT Williams Racing at End of 2019 Season |date=19 September 2019 |website=williamsf1.com |access-date=19 September 2019 |archive-date=20 September 2019 |archive-url=https://web.archive.org/web/20190920122248/https://www.williamsf1.com/racing/news/2019/09/robert-kubica-to-leave-rokit-williams-racing-at-end-of-2019-season |url-status=dead }}</ref> [[2019 Formula 2 Championship]] runner-up [[Nicholas Latifi]] was promoted from his role of reserve driver to replace Kubica for the {{F1|2020}} season.<ref name="Latifi">{{cite web|url=https://www.formula1.com/en/latest/article.latifi-to-williams-for-2020-f2-racer-replaces-kubica.3GkU6EaImKmzKt6qZU0eiF.html |title=Latifi to Williams for 2020: F2 racer replaces Kubica |website=formula1.com |publisher=Formula One World Championship Limited |date=28 November 2019 |access-date=28 November 2019}}</ref> [[Jack Aitken]] replaced Latifi as reserve driver.<ref name="Aitken">{{Cite web|url=https://www.formula1.com/en/latest/article.aitken-joins-williams-as-reserve-driver-after-leaving-renault.2rN9Odf4dbRtaWrq6YSh9t.html|title=Aitken joins Williams as reserve driver after leaving Renault|website=formula1.com|access-date=4 February 2020|date=4 February 2020}}</ref> In May 2020, following publication of significant losses in 2019, Williams announced the immediate termination of its title sponsorship deal with ROKiT.<ref>{{cite web|url=https://www.formula1.com/en/latest/article.williams-could-sell-f1-team-as-board-announces-gbp13m-loss-in-2019-and-split.455wGjds3WOQf7gdSuqJRf.html |title=Williams could sell F1 team as board announces GBP13m loss in 2019 and split from title sponsor |website=formula1.com |publisher=Formula One World Championship Limited |date=29 May 2020 | access-date=29 May 2020}}</ref>[[File:George Russell Mugello 2020, race day.jpg|thumb| George Russell driving the [[Williams FW43]] at the [[2020 Tuscan Grand Prix]]|left]]