LONDON: Ben Watson continued his love affair with the FA Cup as holders Wigan Athletic belied their second-tier status to upset Cardiff City 2-1 on Saturday.

And Sunderland punished Southampton for taking the competition too lightly.

Watson, who grabbed the winner when Wigan shocked Manchester City in last year's final, fired into the top corner after 40 minutes to put the Championship club into the quarter-finals.

Chris McCann had given Wigan, who dropped out of the top flight after their Wembley success, the lead after 18 minutes, before Cardiff, second bottom in the Premier League, leveled through Fraizer Campbell.

A stunning strike from Craig Gardner helped knockout specialists Sunderland book their spot in the quarterfinals with a 1-0 win over Southampton.

Sunderland, who have already reached the League Cup final, again put their Premier League struggles to one side with Gardner thundering a second-half shot into the top corner from 25 meters.

Southampton manager Mauricio Pochettino had to field questions about his team, however, after resting players despite being comfortably positioned in mid-table.

Premier League powerhouses Manchester City and Chelsea face each other in another fifth-round tie later on Saturday.

Sheffield Wednesday's home game with Championship rivals Charlton Athletic was called off because of a waterlogged pitch.

On Sunday, Arsenal host Liverpool, Swansea City travel to Everton and Championship side Nottingham Forest visit third tier Sheffield United.

Championship club Brighton and Hove Albion entertain Hull City on Monday.

Atletico goes back on top

In Madrid, Atletico Madrid moved clear at the top of La Liga for a few hours at least as two goals inside the first four minutes guided them a 3-0 win over Valladolid.

Raul Garcia opened the scoring from a well-worked free-kick after three minutes before Diego Costa lofted in his 25th goal of the season 60 seconds later.

And Diego Godin rounded off the scoring when he headed home the third 17 minutes from time.

Atletico now lead Barcelona and Real Madrid by three points, but Barca can reclaim top spot when they host Rayo Vallecano later.

After three consecutive defeats in league and Cup it was imperative for Diego Simeone's men to get back to winning ways if they were to maintain their title challenge and they couldn't have made a better start.

Garcia fired home his 10th goal of the campaign from the edge of the area from Gabi's free kick.

Costa then doubled his side's advantage as he raced onto Koke's ball over the top and lobbed the ball over the advancing Diego Marino.

Atletico then eased off after their initial burst and Valladolid threatened to get back into the game at the start of the second-half when Javi Guerra volleyed just over.

Mario Suarez nearly made the game safe when he saw his header come back off the bar from Koke's corner.

However, Atletico did get a third goal from another corner 10 minutes later when Godin headed back across goal into the far corner to leave Martino stranded.

Simeone then had the luxury of replacing Koke and Arda Turan with one eye on their return to Champions League action away to AC Mila as David Villa made his return from injury, suggesting he may be fit to start at the San Siro on Wednesday.