Ross Barkley scored a stoppage-time equaliser to rescue a 2-2 draw for Chelsea against Manchester United at Stamford Bridge on Saturday to preserve the Blues' unbeaten Premier League record.
Antonio Rudiger took advantage of some poor defending from the Red Devils to head the hosts in front midway through the first half.
However, the visitors improved after the break and levelled when Martial pounced on a loose ball and fired home 10 minutes into the second half.
The French forward then curled home his second in the 73rd minute after good work from Marcus Rashford.