A late penalty from Cristiano Ronaldo earned Manchester United a vital 2-1 win against Everton.
United are now just one point behind Premier League leaders Arsenal, but had to work really hard for their win.
Ronaldo crashed in an opener for United in the first half, but Tim Cahill soon levelled for Everton with a header.
Wayne Rooney hit the bar with a free-kick after the break, but neither side created many chances until Ryan Giggs was fouled for the spot-kick.
Derby's Giles Barnes celebrates scoring
Derby almost grabbed only their second league win of the season in a 2-2 draw to Newcastle United.
Giles Barnes put them in front early in the game, only for Mark Viduka to level with a brilliant shot.
Derby then went in front again in the second half, when Kenny Miller drove home, only for Viduka to net a second equaliser.
Another win for Chelsea
Chelsea were also winners on Sunday, picking up all three points with a 1-0 victory away to Blackburn Rovers.
Joe Cole scored the only goal in the first half with a well-placed shot, although both teams hit the woodwork during the match.