Chelsea have completed the signing of England international defender Gary Cahill from Premier League rivals Bolton Wanderers for a fee of $10.7m.
Five things we learned from the week's action in the Barclays Premier League.
With the January transfer window now in effect, here's a rundown of each Premier League team's needs:
England manager Fabio Capello will name Wayne Rooney in his line up to face Switzerland in a Euro 2012 qualifier Tuesday despite allegations about the striker's personal life.
John Terry has made his first public comments since being stripped of his role as England's football captain, thanking the fans of his club Chelsea for their support.
Arsenal came back from two goals down to claim a 4-2 victory over Bolton at the Emirates Stadium which saw them climb to the top of the English Premier League.
Manchester United are level with Chelsea at the top of the English Premier League after a comfortable 3-0 home victory over an under-strength Wolves side.
Emmanuel Adebayor scored for his fourth successive match as Manchester City crushed his former club Arsenal 4-2 on Saturday, while English Premier League leaders Chelsea came from behind to beat Stoke 2-1 for a fifth straight win.
England midfielder Gareth Barry has quit Aston Villa for Premier League rivals Manchester City in a $20 million deal after agreeing a five-year contract.
Manchester United maintained their six-point advantage at the top of the English Premier League after Park Ji-Sung inspired a one-sided 3-1 victory against Aston Villa at Old Trafford.