Sinclair has played a vital role for the Bhoys in his debut season at the club, bagging 18 goals across all competitions, as well as 10 assists.
Celtic had dropped points just once in the Scottish Premiership prior to the match and were on course to maintain that record thanks to Stuart Armstrong's goal in the 35th minute.
"It should give them loads of confidence because I think they stood up to the challenge of a very, very good team who move the ball well and they didn't get rattled or lose their discipline".
"I said to the players that it will need a lot of belief to come here".
Under Brendan Rodgers, Celtic have been mighty impressive, and the former Liverpool manager, despite their form, is aware that this derby is going to be tough.
He said on Sky Sports 1: "It's a gamble. I'd been challenging them all week, saying you're the only ones who believe in yourselves".
"Clint Hill told me he felt he got away with it and that tells me it was a penalty".
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He said: "The last match would have been embarrassing for them". We are disappointed with the goal but I'm really proud of the players.
Martyn Waghorn, having spurned the best chance of the first half, couldn't make the most of another glorious opportunity with Craig Gordon managing to block his close-range volley.
'We aim to win every game and if you can't win then you take a point and my only disappointment is that it was a penalty at the end.
The 46-year-old now looks set to quickly agree a deal with Rangers but he is unlikely to be in the dugout for Sunday's clash at Celtic Park.
"He needs to get the team looking at second again".
"These games are always high-pressure and a bit hectic".