"He's a really good player," Nasri said. "Last year when he went (on loan) to Bolton it helped him because he played a lot of games with Bolton.
Related ArticlesTottenham Hotspur 1 Arsenal 4; aetGibbs suffers suspected broken metatarsalTottenham misfire in the battle of the young gunsCarling Cup third round: live scoresArs? Wenger accepts ban for misconductWenger facing touchline ban"Now he's ready to play and be a good player for Arsenal. And I think England need a player like him. Jack is a wonderful prospect for the future."
Nasri also revealed he had agreed with manager Arsene Wenger that he would take the spot-kicks, after Tomas Rosicky missed from 12 yards against Sunderland on Saturday.
"I provoked the foul and then I didn't take the penalty," Nasri said. "But after I talked with the boss and said, 'Next time I will take the penalty', and I scored."
Wilshere is hoping Arsenal can go all the way to Wembley in the competition, but said: "We don't want to get ahead of ourselves. In the last couple of years we fell short.
"Hopefully we can concentrate on each match as they come and hopefully we can win it."
Wenger also hailed Wilshere's display, adding: "We know that he's an outstanding football player.
"But he can get tackles and give tackles, he's tough. I believe he has an outstanding future. He just needs to keep well, humble and enjoy his game."
Wenger admits 18-year-old Wilshere is ahead of where he expected him to be in his career progression.
"He's much ahead," Wenger said. "But I believe as well that talented players play early. All the big players play early, at the age of 18 they start to play at the top level.
"He can handle it. If he can handle it mentally what happens to him there is no problem, he will be a great player."