en-us http://sport.aol.co.uk Copyright 2009, AOL. All Rights Reserved. Sun, 22 Nov 2009 01:26:00 GMT 60 Andy Murray insists he will not change his approach at this week's Barclays ATP World Tour Finals in London even if it jeopardises his chances of winning the prestigious title on home soil.]]> Sat, 21 Nov 2009 16:52:41 GMT Novak Djokovic is hoping he will deal better with the pressure of defending a big title than he did the first time around when he takes to the court at London's O2 Arena in the Barclays ATP World Tour Finals this week.]]> Sat, 21 Nov 2009 16:52:42 GMT Roger Federer insists reports of Rafael Nadal's demise are premature - but has warned the Spaniard he will not give up his number one ranking again without a fight as the pair prepare to do battle at the Barclays ATP Tour World Finals. ]]> Sat, 21 Nov 2009 16:52:43 GMT ATP chairman Adam Helfant has confirmed the governing body will not be reinvestigating Andre Agassi's positive drugs test in 1997 and cannot impose retrospective sanctions. ]]> Sat, 21 Nov 2009 16:52:43 GMT US Open champion Juan Martin Del Potro has committed to playing at the Aegon Championships at Queen's Club for the next three years.]]> Sat, 21 Nov 2009 16:52:46 GMT Belgian duo Yanina Wickmayer and Xavier Malisse have appealed to the Court of Arbitration for Sport against one-year bans for breaching anti-doping rules.]]> Sat, 21 Nov 2009 16:52:47 GMT