Arsenal legend Martin Keown has urged Everton defender John Stones to snub a move to Chelsea in the summer transfer window.

The 21-year-old has been in fine form for the Merseyside club and his impressive display for Everton has seen him attract interest from top clubs in England. The Mirror reports the Premier League champions and their league rivals Manchester United are interested in signing him.

The former Gunners centre-back spent four years at Goodison Park and believes Stones is still far from being a finished product. He has warned the central defender that he should continue with his current employers until the end of the 2015/16 season before deciding to leave the Toffees.

"He should stay. He still needs to grow as a player and he needs to know he is number one choice," Keown told talkSPORT.

"I don't think the [Chelsea] manager is completely stable at the moment, he is going through a really difficult period, and he is better staying at Everton for another season.

"They adore him, the Evertonians. They got me in the England team because they were so supportive. He needs that warmth for at least another year for his development.

"He still has things to work on. I don't think he is superb from crosses, I don't think he marks brilliantly. I want to see him being more commanding from set-pieces, and all that comes from being the leader in a group for a team like Everton and then maybe he moves to Chelsea.

"He is going to be an outstanding player but I don't get this massive rush. Just stay where you are and develop and do the job for Everton. It is a huge club there," he added.

Meanwhile, Everton manager Roberto Martinez has ruled out any potential move for Stones in the ongoing transfer window. The former Wigan manager said Stones's immediate concern will be for their next fixture as they host league leaders Manchester City on 23 August.