The WBA light welterweight champion Amir Khan and his promoter, Frank Warren, are squaring up to the social networking site Facebook in a legal battle that could have far-reaching consequences.

iSport Media are proud to have taken a leading role in managing Gabriel Heinze's online profile. As well as creating a fantastic website (www.gabrielheinze.com), and optimising it, we have also taken the Argentine superstar onto the largest social networking sites - facebook and twitter included - to safeguard his image.

Roger Federer has become one of the first sports-stars on facebook, and has managed to notch up over 2 million fans!

Roger (available at www.facebook.com/Federer) has adopted the website, creating an official page, in order to better communicate with his fans. He now has some 2.9millions listed as his fan-base, with each one of them being alerted whenever Roger updates his status, adds a photo or send round his sponsor's latest video.

Darren Bent has landed himself in hot water with his bosses at Tottenham Hotspur after publishing comments criticising Daniel Levy on twitter.com. At first, the press were unsure as to whether the comments were actually coming from the player - using the username db10thetruth - but they were later confirmed.

Bent, the Spurs and England centre forward, is understood to be increasingly frustrated about the slow pace of his transfer to Sunderland as the two clubs haggle over a fee and the size of instalment payments.

Cristiano Ronaldo's agents have decided enough is enough after a facebook page dedicated to their client started putting up copyrighted images and videos, and connecting him to spurious websites.

The biggest unofficial Cristiano Ronaldo Facebook page - one of the largest on facebook - has been shut down by the site despite having almost three million fans and getting half a million hits every month.

Juventus legend Alessandro Del Piero is preparing to take legal action against the social-networking site Facebook after a fake profile with his name and image appeared on it.

The profile had links to a Nazi propaganda group and it contains pictures of Del Piero, which have led the striker to consider taking action for defamation.