Rio Ferdinand has identified the one bit of transfer business Manchester United need to complete this summer - tie down David De Gea to a new deal.
The Red Devils have been linked with a number of world-class players including Kalidou Koulibaly and Philippe Coutinho ahead of the transfer window opening and could be a serious force to be reckoned with next season.
But Ferdinand thinks the most important bit of business his former club must complete is a new deal for their number one, because without him the 'foundations' won't be there.
When asked if Manchester United can afford to lose De Gea on BT Sport, Ferdinand responded: "I wouldn't say so. I think they need to get that bit of business done as soon as possible.
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"The last few years he has been the best goalkeeper on the planet.
"If you're going to try and build a title-challenging team you have to get the foundations right and he is right in the mix of those foundations.
"So they need to sort that out (his contract)."
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De Gea, whose is out of contract at the end of the season, has been in a stand-off with Manchester United for a few months now, but the club remain confident he will sign a new deal.
Real Madrid are reportedly keen on the Spaniard, despite having recently signed Thibaut Courtois, as the Belgian isn't favoured by Zinedine Zidane.
