Mourinho's first big sign-up after returning to the Stamford Bridge club will be the Altetico Madrid striker Radamel Falcao, the Mirror reports.
According to the report, Wenger has admitted that the arrival of the Portuguese coach in Chelsea would make the club win the rest of the Premier League series.
Despite his worry for Arsenal, Wenger has said that this is going to be one of the busiest summers for Chelsea even though they have a great base to their squad, adding that the club will be making big moves in terms of investment.
Wenger believes that although Rafael Benitez is doing a good job at Stamford Bridge as the interim manager, Mourinho will be a good solution to replace him, the report added. (ANI