Arsene Wenger has said he is "afraid" of what Chelsea can do in the this summer's transfer market, and that former manager Jose Mourinho "would be a good solution" for the London club.
The ex-Chelsea and current Real Madrid boss is rumoured to be heading back to Stamford Bridge in the summer.
And, in an interview with Eurosport, Wenger said: “I’m afraid of what Chelsea can do in the summer. We have to be prepared for them to be one of the biggest movers in terms of investment once the window opens.
“Even though they already have a great base to their squad, notably their young players such as Oscar, Juan Mata, Ramires and Eden Hazard, I think they will be busy during the transfer window.
“We’ve heard a lot of talk about Radamel Falcao. Some people say it’s already a done deal, but I’ve heard nothing."
He also had measured praise for embattled current Chelsea manager, Rafael Benitez, saying: “I think Chelsea currently have a great coach in Rafa Benitez, but if they part ways at the end of season, of course Jose Mourinho would be a good solution for Chelsea.
“Mourinho is one of the best in the world. But I consider Benitez to be doing a good job at Stamford Bridge.”