London, Apr 7 : Sir Alex Ferguson has said new teen sensation Federico Macheda has kicked the club into overdrive.

Fergie claims the teenager's stoppage-time goal to beat Aston Villa will be the defining moment of the season as his side chase an amazing Quintuple.

"That goal has just galvanised the club. There will be an adrenalin rush and players like Cristiano Ronaldo will, hopefully, now go into overdrive," the United boss said.

"There is that sense of the big occasion now. Every game is now big. Sunday was a defining moment. We're still in with a chance of winning three more competitions."

United have already lifted the Carling Cup and the Club World Cup, The Sun reported.

They are now a point clear of Liverpool at the top of the Premier League after beating Villa 3-2 on Sunday, face Everton in the FA Cup semi-finals and meet Porto in the Champions League quarter-final, first leg tonight.

Macheda's injury-time winner against Villa came on his first appearance for the senior team.

Now the 17-year-old Italian forward, nicknamed Kiko, has played his way into Ferguson's squad for tonight's showdown with Porto at Old Trafford.

Fergie said: "I think he will be involved on the bench. I've got Wayne Rooney back which is a big bonus but, yes, it's difficult to leave him out, isn't it?"

United will be looking to tighten up at the back after Sunday's ding-dong thriller with Villa at Old Trafford. (ANI)