Roberto Martínez has praised John Stones for his professionalism after Chelsea’s multiple bids for the defender were rejected – a transfer saga that had the Everton manager singing in the shower.

Chelsea made three unsuccessful formal bids for Stones, the last worth over £30m, which prompted the England defender to hand in a transfer request. However, Everton stood firm, and Martínez said the 21-year-old had since shown “incredible maturity and composure”.

Looking towards Saturday’s early kick-off against Chelsea, Martínez also denied that his relationship with José Mourinho had been damaged by the summer’s dealings. “Nothing changes,” he said. “It is part of the rules. In the transfer window you are allowed to make enquiries and offers for players.

“But it gives you a bigger feeling of control when you can decide what to do with those attempts. John has gone from strength to strength in a period of high pressure and has used it in the right way, taking the support of everyone at the club and has performed with incredible maturity and composure. The way he went away and performed for England in a very natural manner shows the calibre of player we have.”

Reports have suggested that Stones, who has four years remaining on his existing deal, wants to negotiate a new contract with a buy-out clause in the region of £37m inserted, but Martínez gave that speculation short shrift.

“I thought that when the transfer window was over we would be able to concentrate on the games and that is the only thing I am focusing on,” said Martínez, who added he had been singing: “Can’t buy me Stones,” – to the tune of The Beatles’ Can’t Buy Me Love – in the shower.

“Any story or any backlash still from the transfer window I am not going to entertain. Our interest is to look after every player who represents the club, they need understanding and we are going to look after the human being as well as we look after the footballer, and in this case we have shown that is what we have done. Our best interest is to continue developing John to allow him to be a very important footballer for us. We will do that with every single player in the club.”

While the return of players from international duty has not brought any additional injury problems, Martínez has been able to put a timescale on the absence of Tom Cleverley, who injured his ankle at Tottenham at the end of last month. “The scans revealed it was no fracture and it was only ligament damage and although it will be a long period it is not as bad as feared. With ligament damage you could expect six to eight weeks but knowing how strong and fit Tom is we’re looking at six weeks.”