Manchester United legend Paul Scholes says his old club must sign Real Madrid attacker Gareth Bale.

Bale came off the bench to score two goals, including an incredible bicycle kick, to help Real Madrid beat Liverpool 3-1 to lift their 13th European Cup on Saturday night.

"If he [Jose Mourinho] can change something through the summer, buy new players and he can find a way of playing that maybe is a little bit more entertaining then who knows, you don't know," Scholes said, speaking at an official UEFA Champions League final viewing party at London's Sky Garden.

"A lot can happen over the summer. Let's hope we can get close again.

"We need some good attacking players. I think the nucleus of the squad is quite good, there's some really good young attacking players.

"I think he possibly needs a bit of help with [Romelu] Lukaku. He seems like the only out-and-out centre-forward he's got.

"It's hard to know what's available, would Gareth Bale be available? People like Neymar will they be available? I don't know. These are the type of special players that I think United need."