[4] The car was driven by four time world champion Sebastian Vettel and Ferrari debutant Charles Leclerc in every race of the 2019 season.

[10] Ferrari changed the engine cover on the SF90, making it smaller compared its predecessor, the SF71H, in order to save weight and improve aerodynamics.

[14] After the first week of pre-season testing it was the SF90 which had the clear advantage having completed a high number of laps and with both Leclerc and Vettel commenting how comfortable they felt with the car.

[19] At the Bahrain Grand Prix Ferrari locked out the front row of the starting grid just as they had done the previous year, with Charles Leclerc setting a new track record in the process.

[20] However, during the race both cars suffered from issues, Vettel from driver errors and Leclerc with an engine problem which cost him the victory.

The resulting delay of qualifying, and subsequent drop in track temperatures, played into the hands of the Mercedes, who locked out the front row with Vettel salvaging third for Ferrari.

[30][31] At the French Grand Prix, Leclerc took third in qualifying while Vettel was hampered by an engine issue and started ninth.

[32] At the Austrian Grand Prix, Leclerc took his second pole position of his career while Vettel did not set a time in Q3 due to mechanical issues.

During the race, an intense battle developed between Verstappen and Leclerc, which culminated in the Red Bull overtaking up the inside heading into turn 2.

[34] At the German Grand Prix, Ferrari seemed to be competitive for pole position, but the team had mechanical issues for Vettel in Q1 and Leclerc in Q3.

[43] At the Japanese Grand Prix, the Ferraris locked out the front row, with Sebastian Vettel setting a track record pole time.

Leclerc was instructed to stay out despite a clearly damaged front wing, showering bits and pieces onto the cars behind.

Finally, Michael Masi, the race director, instructed Ferrari to call Leclerc into the pits to repair the front wing.

In the end, Leclerc finished a lap down in eighth place, promoted to sixth following the disqualification of the Renault's, while Vettel withstood a challenge from a charging Hamilton to hold on to second.

[45] At the Mexican Grand Prix, the Ferraris appeared to once again be the team to beat, with Leclerc taking pole position ahead of his teammate after Verstappen received a penalty for ignoring yellow flags.

However, an alternate strategy from Mercedes and Ferrari's lack of race pace saw the two drivers finish fourth and second for Leclerc and Vettel, respectively.

However, the team suffered a poor start, with Vettel dropping five places on the first lap as he struggled to warm his tyres.

[52][53] As their form had noticeably improved when compared to their first 12 races of the season, Red Bull issued a query to the FIA asking for clarification if utilising a system that got around the fuel flow sensor would be allowed.

[53] The FIA responded before the United States Grand Prix, reminding all competitors through a technical directive that such systems would not be allowed.

[54] Subsequently, Ferrari's form faded as they failed to score a pole position or a race win in the remainder of the season.

[57] All of the non-Ferrari-powered teams were "surprised and shocked" by the announcement, urging the FIA to give full disclosure of the legality of the 2019 Ferrari power unit.