Manchester City boss Roberto Mancini, again challenged Micah Richards to show his best performance to prove that he is the best right back in England.

The 23-year-old defender has the opportunity to impress new England manager, after  Fabio Capello’s resignation due to dispute with the FA.

In the selection  order in the Three Lions defense, Richards isbehind Liverpool defender Glen Johnson and Kyle Walker from Tottenham Hotspur, although he appeared impressive with the Citizens this season.

Mancini has long recognized the potential of the 23-year-old defender, but the former Inter Milan boss has also warned Richards not to expect too much to be called quickly to strengthen the England squad, which he joined last time in November 2010, since he still needs much to show.

“Micah has everything to be a top wing-back. I think he has grown a lot from last year, but he could still improve his abilities and become better,” Mancio said as quoted by espnstar.

“For the time being in the national team, probably Johnson or Walker are the best. But I did not say Micah is not playing for the national team. If he wants, Micah can play as usual,” he said.

“If the England manager had to choose from the three, between Johnson, Walker, and Micah, one of the three should be issued. Micah could play for the national team with Capello, but there are many players in the UK and the manager can only call 20-22 players to compete in the Euro 2012, “said Mancio.

“I think Micah could really be a top wing defender, but he needs to develop himself better,” he concluded.