Celtic boss Brendan Rodgers left Parkhead for Leicester City back in February.
Rodgers departed Celtic mid-way through the campaign, after Leicester City came in for him.
The popular manager’s exit could have rocked Celtic, but the Bhoys have remained on course to lift the treble for the third season in a row.
And Sinclair feels that Neil Lennon, who came in to replace Rodgers, should be given plenty of credit for the job he has done at Celtic.
“It was a shock for the whole squad when Brendan went,” the £3 million forward said (the Guardian). “No-one saw it happening. We came into training one day and he left.
“It was quite difficult for us as players but at the same time, we got on with it. You move on. That’s exactly what we have done.
“It was a tough time for Lenny to come in, with all the uncertainty among the players about what was going on.
“He has come in with his own ways and he is a totally different manager to Brendan. They are their own men and have different styles of playing. He has done a great job, he’s got us to another cup final and eight in a row.”
Celtic have one more game to play this season, as they take on Hearts in the cup final tomorrow.
If Lennon is to have a chance of getting the job on a permanent basis it is widely agreed that Celtic will have to win at Hampden Park at the weekend.
Celtic beat Hearts 2-1 in the league last weekend, which should give them plenty of confidence of picking up a result tomorrow afternoon.
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