Romain Grosjean is just three points away from a one-race ban after he ignored blue flags at the Singapore Grand Prix.
With Grosjean and Sirotkin battling for track position, the blue flags were not top priority for either driver as Hamilton tried to thread his way through.
Grosjean was subsequently given a five-second penalty for ignoring the blue flags and it dropped him down to a rather lowly P15 finish after starting the race from P8.
The Frenchman was also given two penalty points, which takes him to nine for the 12-month period. Three more before October 29 will see him on the sidelines for one race.
He loses one point on the aforementioned date and a further two points will be dropped on November 12.
Grosjean is the last driver to be banned from a grand prix after causing a huge collision at the Belgian Grand Prix back in 2012.
It was a long day at the office for our @Haas_Automation team.
The silver lining? @KevinMagnussen set the fastest lap of the race!
— Haas F1 Team (@HaasF1Team) September 16, 2018
The Frenchman apologised for his actions, saying he did not intend to block the race leaders.
“I think it was a frustrating race for everyone who qualified between seventh and 10th on the hypersofts,” Grosjean said.
“It was such a poor tire in the race. We did 10 laps and they completely went, while the ultrasofts did, I don’t know how many laps, 40? So, it’s almost better not to qualify in the top-10.
“Maybe we need to think about that a little bit because I felt like I pushed really hard in qualifying and in the race every single lap. I did the best I could but, in the end, I had no chance of being in the top-10.
“I’m sorry if I blocked anyone, it was not my intention.”