Ferrari and world champions Red Bull have both decided to withdraw from the Formula One Teams Association (FOTA), the organization announced on Friday, amid a row over how to reduce costs in the sport.

The teams confirmed their intention to pull out on Friday afternoon, with Ferrari claiming "FOTA's drive has run its course".

Arsenal midfielder Abou Diaby has suffered a new injury setback, with a hamstring injury ruling him out of Saturday's match with Wigan, his club confirmed on Friday.

The French international has missed almost the entire season so far after undergoing an ankle operation in the summer and his comeback was then delayed by a muscle injury suffered in training.

A week after slowing Manchester United's title challenge, Newcastle will look to do the same to struggling Chelsea and provide further evidence of its ability to compete with the Premier League's top teams this season.

Newcastle is holding its own among exalted company at the top of the division, with a 1-1 draw at second-place United keeping the northeast side in the Champions League positions.

Argentina decided to hold back David Nalbandian, opting instead to send Juan Monaco up against Rafael Nadal in the opening singles match of the Davis Cup final.

Nadal will take on Monaco on Friday in the opening match of the best-of-five series on clay at the Olympic Stadium, with Nalbandian picked to play in Saturday's doubles.

Liverpool midfielder Lucas Leiva will miss the rest of the season after he damaged knee ligaments in his team's League Cup quarterfinal win over Chelsea.

The Brazil international was hurt in a seemingly innocuous challenge in Tuesday's 2-0 win.

While Real Madrid and Barcelona are already eyeing their upcoming matchup, the Spanish giants first have to get past a pair of awkward opponents this weekend.

League leader Madrid is waiting on the fitness of Cristiano Ronaldo as it prepares to put its 13-game winning run on the line at Sporting Gijon on Saturday, when Barcelona welcomes early season revelation Levante to the Camp Nou.

Manchester City's owner has praised manager Roberto Mancini for following the "right path" toward achieving the club's main objective, winning the Premier League title.

In rare public comments, Sheikh Mansour bin Zayed bin Sultan al-Nahyan told Dubai-based Sport360 daily newspaper that the club's main goal for the season is still within reach, despite City's slim chances of remaining in the Champions League.

Prince William, his wife Catherine and his brother Prince Harry will promote British athletes in the run-up to the 2012 London Olympics, their office announced on Thursday.

The trio said they were "honored" to become ambassadors for Team GB and ParalympicsGB, and will play an active role encouraging the public to support the teams.

Players from Barcelona and Real Madrid made up almost half of the 55-man shortlist revealed by FIFA on Thursday for the FIFA FIFPro World XI 2011, which will be announced on January 9.

Barcelona have 11 players in the list and Real 10.

Ukraine has finally opened all the stadiums that will host Euro 2012 matches but there remain fears that the biggest event the country has hosted since independence will be mired in organizational problems.

After repeated delays Ukraine in the last weeks opened a reconstructed stadium in the capital Kiev for the football extravaganza and a completely new venue in Lviv to go with already ready facilities in Kharkiv and Donetsk.