CHICAGO (AFP) - Manchester United manager Louis van Gaal conceded that uncertainty surrounding David de Gea was "not favourable" as the Premier League giants ended their US tour on Wednesday with a 2-0 defeat to Paris Saint-Germain.

De Gea, who is reportedly Real Madrid's top summer transfer target, gave a shaky goalkeeping display. The French champions exposed United's defence with soft first-half goals by Blaise Matuidi and Zlatan Ibrahimovic.

Van Gaal is hopeful United will retain the services of de Gea but acknowledged the rumours swirling around the star goalkeeper were not helpful to either the play or the club.

The veteran Dutch coach was reluctant to be too critical of the Spaniard's performance however. "Poor I cannot say but he made a mistake. That's not poor," van Gaal said.

Despite the loss, he was pleased with United's performance as they build towards their season-opening clash with Tottenham on Aug 8.

"I'm really satisfied about the performance. You lose, maybe that's also good, because last year, we have won everything (in the US) and then we lost the first match against Swansea," van Gaal said.

"Maybe now the sequence is a bit different but I'm not superstitious. I think in the first half, we have created more chances than PSG and they have created only chances with personal errors and you cannot fight against personal errors.

"When you're playing against top level, and PSG are top level, then they can score out of these kinds of errors and they can finish the game.

"A top team can do that. Chelsea can do that, PSG can do that."