Barcelona star Dani Alves and his agent, Dinorah Santana, have again admitted the Brazilian star may leave the Camp Nou next summer – with both Liverpool and Manchester United reportedly monitoring the situation.

The 31-year-old defender was a key player during Barcelona golden years, winning two Champions Leagues and four La Liga tittles – but his future at the club has been under doubt.

Reports in the summer said the Brazilian was out of new manager Luis Enrique's plans and that he stayed at the La Liga giants because no club wanted to meet his salary demands.

But with his contract at Barcelona due to expire next summer, it looks like his future with the Catalan side will be over in 2015, with Alves free to hold negotiations with clubs from January.

Recently, the player himself revealed he will leave the Nou Camp to move to the Premier League.

"This will be my last season at Barça. Next year I'm moving to England. I want to play in the birthplace of football," Alves said at the time.

"I'm not going to worry or lose hope, nor will I stop competing as I usually do just because I have a few months to go on my contract and if bad things happen (an exit), well that's life," Alves said, according to AS.

Santana added: "If Barcelona wanted to renew Alves' contract, they would have done it.

"I would not do things like this. We will see what is available in December and January... after that we will see what is the best option."

With Glen Johnson's contract at Anfield set to expire, Liverpool may consider Alves as his replacement while United are also reportedly monitoring the situation.

Alves also has spoken about the current season with Barcelona and looking forward to play alongside former Liverpool hero Luis Suarez.

"I'm just as anxious as he is for him to start playing and he really feels like a Barcelona player. He's a beast. I'm sure he's ready, he's working incredibly hard and is so keen to play," he said.

Suarez is banned from competitive action for four months after biting Giorgio Chiellini during a World Cup match against Italy but the Uruguayan international is expected to make his Barcelona debut in the La Liga Clasico against Real Madrid on 25 October.