Gareth Bale has struggled with injuries since moving to Spurs in the summer window.
The 31-year old winger made only 11 starts for the North London club and just four Premier League appearances so far.
He has struggled to earn a starting role in Mourinho’s squad but the manager is convinced about his ability and hopes he can take a bigger role in the days to come.
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“He doesn’t need to convince me of anything. I am totally convinced about everything,” Mourinho said.
“It’s not about convincing me, it’s about being ready to play the minutes we all would love him to play.
“It’s a process. You feel that in matches in the last couple of years. It’s the process. We want him of course to be ready to play every minute of every game.
“He is a player with special qualities, you could see against West Ham in the second 45 minutes the positive impact in the quality of the game. He had a cross, he had a couple of assists, he hit the crossbar.
“Bale is doing that better and better, but he is not playing 90 minutes, he is not playing every game. We have to manage his evolution, but he has nothing at all to convince me about.”