And Manchester City supporters will be hoping to see a new name in charge of the team this week.
But the arrival of new bosses merely adds to the speculation surrounding players during the summer transfer window.
Mourinho has made his first move in the transfer market and laid down a marker to one of his title challengers, claims another newspaper report.
Read on to find out more.
United are looking for new personnel in midfield after the retirement of former England international Paul Scholes at the end of the season.
But Mourinho is determined to land the 26-year-old Uruguay international ahead of his Premier League rivals, who are still without a manager. He has made a bid of £49.3 million for Cavani after an offer of Fernando Torres plus £25.5 million was rebuffed by Napoli, claims The Mirror report.
According to The Mirror, the Italian club want potential suitors for Cavani to trigger a £53.6 million buyout clause before agreeing to sell the forward.
The Portugal international has been linked with a return to Manchester United this summer, and The Sun has reported that the 28-year-old is now looking for a new £32 million-per-year deal not to join the Old Trafford club.
Ronaldo refused to celebrate his winning goal against United in the Champions League last 16 in March in recognition of his bond with the club, as Spanish newspaper Marca reported.
Ronaldo joined Real from United for a world-record fee of £80 million in July 2009, as BBC Sport reported, and has two years remaining on his current deal at the Bernabeu Stadium.
The 29-year-old still has two years of his deal at White Hart Lane left to run, but the Turkish side are keen to conclude a deal swiftly, according to the report.
Cameroon international Assou-Ekotto joined Tottenham from RC Lens in France in 2006 and has made 151 appearances for the club, scoring four times.
Wigan Athletic striker Kone has emerged as a target for Anfield manager Brendan Rodgers with Luis Suarez voicing his desire to leave the club, as the Daily Telegraph reported, and an injury doubt over Daniel Sturridge for the start of the new season, as The Sun report highlighted.
The Ivory Coast international, 29, scored 11 times in 33 appearances in his first season with Wigan last season after Martinez signed him from Levante.
Kone was immediately linked with a move to Everton following Martinez's appointment this week, as the Daily Express reported.