Alli scored a magnificent overhead kick to give Mourinho’s side the lead in a comfortable 4-0 victory.
He also provided assists for team-mates Carlos Vinicius and Gareth Bale, as Spurs romped to an 8-1 aggregate victory over the Austrian side to advance to the last 16 of the Europa League.
Dele Alli put in a man of the match display with a goal and two assists against Wolfsberger
The 24-year-old has struggled for game-time this season but impressed in a rare start
It was a much needed performance for Alli in a rare start for Mourinho’s side this season.
After making 25 appearances last season, the 24-year-old has made just five in the Premier League so far this campaign.
Mourinho said after the match that it had been a ‘difficult period’ for the Tottenham star but that he has been ‘working with motivation’.
He said: ‘We had a difficult period, he had an injury and at the same time talk, talk, talk about staying or leaving.
‘The market closed, the injury went and he started working with motivation. He is playing very well, I am not saying in this moment we have a starting line-up because of so many matches but it is coming.
‘The goal was beautiful but the meaning of the assists and hard work for team means more to me. That work of continuity in the performance is what makes me really happy.’
Jose Mourinho described Alli’s opener against Wolfsberger in the Europa League as ‘beautiful’
Defender Eric Dier felt Alli’s goal provided as a timely reminder to some of his critics.
He told BT Sport: ‘I’m delighted for him. A fantastic goal and I think step-by-step he is getting back to his best and that goal was another glimpse of that and what he can bring to the team.
‘In football everyone has a short memory and maybe they have forgotten Dele’s quality – he’s given them a reminder of that tonight and hopefully he can keep pushing.’
Eric Dier congratulates Alli after what was the opening goal of their second-leg victory