Manchester United should go all out to sign Real Madrid attacker Gareth Bale in this summer's transfer window, according to former Red Devils captain Rio Ferdinand.

Bale started Real Madrid's Champions League quarter-final second leg against Roma on Tuesday night, but was hooked at half time following a poor first 45 minutes.

The 28-year-old is reportedly keen to stay at the Bernabeu, but Real Madrid are said to be preparing to sell the Wales international to the highest bidder this summer.

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United were strongly linked with Bale before the attacker joined Los Blancos from Tottenham Hotspur, and continue to be credited with an interest in the former left-back.

Ferdinand has said that he would '100%' take Bale at Old Trafford despite the former Spurs winger finding it difficult to remain injury-free over the last couple of seasons.

Ferdinand told BT Sport:

"For his talent, 100% [I would want him]. If you get him at a decent price, but talent-wise there's not doubting this guy. But it's just getting him out on the pitch every week is the problem. He hasn't been able to do that.

"He's a huge talent. He's had a bad season by all accounts from what they're saying, their fans are disgruntled and not happy about him. He's got 16 goals. In the Premier League, I'd love to see him here."

Bale has managed 81 goals and 59 assists in his 182 Real Madrid appearances since making the switch from Tottenham in the summer of 2013.

This term, the Welshman has managed 14 goals and eight assists in 32 appearances - including 11 in 21 La Liga matches.