Courtois returned to the starting line-up after Petr Cech was called upon for the League Cup final.
Eden Hazard got the only goal to keep the league leaders five points ahead of champions Manchester City in the title race but it could have easily ended up differently, with both sides having numerous opportunities in a game that could have ended up 4-4.
Courtois missed the first cup final Chelsea were involved in since he returned from his loan spell at Atletico Madrid, with Jose Mourinho opting for Petr Cech in the win over Tottenham at Wembley on Sunday, but Courtois was given the nod for the league game - and if he had a point to prove then he certainly made it last night to deny Sam Allardyce's men, who threw everything at Chelsea.
It's not the first time that Courtois has played a starring role in a Chelsea victory, as he played a big role in the side even being allowed to play for the League Cup on Sunday thanks to two great displays in the semi-final against Liverpool - and there have been numerous occasions in the league this season where he has come up with a vital save, and for Chelsea to go on and win the game afterwards.
Blues fans were suitably impressed with his performance from last night - here is what a few of them had to say:
We actually owe those 3 points to Courtois. I find that Jose points out when Cech does well but hardly highlight when the Belgian does— Denno (@Denno876er) March 5, 2015
How many MOTM has Courtois won?! I'm counting 5, i think......— #COC-CHAMPIONS! #CFC (@Cartha_of_CFC) March 5, 2015
Courtois >Cech. It took me a long time to admit it.— Nathan (@Costawrap) March 5, 2015
Courtois was brillant again last night— Tyrell Bailey (@TyrellioB) March 5, 2015
Don't know if Chelsea were on TV last night... But I wish they were so you could have seen how good Courtois is. Best in the world IMO.— Alex Cattini (@AlexCattini) March 5, 2015