David de Gea says he has been using their time together at Spain's pre-World Cup camp to try to convince Cesc Fabregas to join him at Manchester United.
Barcelona midfielder Fabregas was heavily linked with a move to Old Trafford last summer but eventually committed his future to Barca.
The former Arsenal captain, 27, is again being linked with a move away from Catalonia this summer, with Barca's board seemingly looking to raise funds as new coach Luis Enrique plans to make changes to the side.
De Gea, who is set to make his senior Spain debut in a friendly against Bolivia on Friday, told El Larguero he would love to see Fabregas link up with fellow La Roja colleague Juan Mata at club level but accepted any move would be "difficult."
"I have tried to convince [Fabregas] to come," he said. "We would have another Spaniard, but it is difficult. He is a top-level player -- many teams want him. He said he liked it at Barcelona, it was his home, and the truth is it would be difficult for us to get him."
Fabregas had told the BBC in February that he was "flattered" by United's interest but "very happy" at the Camp Nou.
Meanwhile, AS reported this week that United had attempted to convince Spain boss Vicente del Bosque to succeed David Moyes prior to the appointment of Louis van Gaal.
Asked about the speculation, De Gea said: "We know that Vicente is a great coach, and is doing magnificent work here. He would also do so in Manchester, but I guess he really likes it here and is staying here."
AS reported that Del Bosque, who led Spain to glory at the 2010 World Cup and Euro 2012, plans to remain in charge of La Roja for a further two years before taking another role at the Spanish FA.