The Portuguese replaced Mauricio Pochettino early last season after the club had a dismal start to the season.
While his tenure has not always been smooth sailing, Spurs are within touching distance of the top of the Premier League table.
"It is exactly a year since Jose Mourinho took over as Spurs manager. At the time I said it was a good appointment and backed Mourinho to succeed when many fans were unhappy about his arrival," the ex-Tottenham striker told Betfair.
"I bet they're not complaining now. Spurs' league position shows Mourinho is taking the club in the right direction. And they're not just playing defensive football either - just look at the brilliant form Son Heung-min is in at the moment.
"At the same time, no manager is more than two defeats from a crisis so he needs to keep up the good work."