Having spoken of his desire to return to management over the past few months, former Manchester United boss Mourinho has finally made his return after replacing Mauricio Pochettino at Tottenham on Wednesday morning.
It is no secret the Portuguese likes to splash the cash, having done so during his time at Chelsea and United, so who will he be targeting over the next couple of transfer windows?
The winter window is often a difficult one for clubs, who are sometimes forced to pay over the odds to acquire new players, but there are suggestions some funds will be available for Mourinho to spend in the new year.
One area that Spurs are lacking reinforcements in is the striker department with England international Harry Kane, who has scored 131 Premier League goals, the only real out-and-out option to lead the line.
Interestingly, Sweden's record goalscorer Zlatan Ibrahimovic is a free agent after recently ending his time with LA Galaxy and he could be a fantastic short-term option to help Tottenham until the end of the season.
The 38-year-old, who has been linked with a return to AC Milan, was under the guidance of Mourinho when they were both at Old Trafford and a reunion could be on the cards come January.
It looks like Mourinho will have several positions to fill this summer due to the expiring contracts of Toby Alderweireld, Jan Vertonghen and Christian Eriksen, who will all become free agents in the summer, as things stands.
With the trio expected to depart for pastures new, the Portuguese will have to scour the market for replacements and one of those could be Napoli's Kalidou Koulibaly, whose stock continues to rise over in Italy.
The Senegal international is a powerful centre-back, the type of defender Mourinho likes, and there are suggestions he is ready to make the move to the Premier League after nearly five years in Naples.
Another CB that could be heading to the Tottenham Hotspur Stadium is Ivory Coast international Eric Bailly. The 25-year-old was the first player signed by Mourinho when he was in charge of the Red Devils and the defender is still said to be a firm favourite of the manager.
The former Villarreal star has suffered with injuries during his time at the 'Theatre of Dreams' but with his contract coming to an end in the summer, he would be a steal if Spurs can get him on a free.
Finally, with Christian Eriksen likely to join Real Madrid for free, Spurs will need to bring in a new creative outlet and that could potentially open the door for a move for Ajax's Hakim Ziyech.
The Dutch club's CEO, Edwin van der Sar, recently said the Eredivisie champions' best players would likely leave at the end of the season and Ziyech is expected to be one of those heading for the exit.
The Morocco international has been a star performer for the past couple of seasons and he is attracting interest from several Premier League teams, including Manchester United, Liverpool and Chelsea.