David De Gea's goalkeeping howler allowed Manchester United to suffer yet another defeat on the road as they lost 1-0 at West Ham on Sunday in turn threatening their top-four ambitions. Just a few days ago United were heavy favourites to finish in the Premier League's top four but now they are wobbling badly while the Hammers have edged closer to safety. The result hinged on a catastrophic first-half error by De Gea, who let a tame shot from Said Benrahma squirm past him in the 27th minute after his team had largely dominated the opening period. De Gea's blunder came on the day on which he became the most-capped goalkeeper in Manchester United's history, appearing for the 540th time to move ahead of Alex Stepney. They are still in fourth place but are now just one point ahead of red-hot Liverpool in the race to qualify for next season's Champions League, even though they still have a game in hand.