Andy Murray knows there's still work to do at ATP World Tour Finals in London
Andy Murray was delighted to come out on top in a tough opening encounter against Tomas Berdych in London.
Last Updated: 05/11/12 6:24pm
The British number one had to come from a set down to clinch a 3-6 6-3 6-4 victory, giving him the perfect start in a group that also includes Novak Djokovic and Jo-Wilfried Tsonga.
The result puts him in a promising position to make it through to the semi-finals, though the Scot is taking nothing for granted; he won two of his three round-robin matches back in 2009 but still missed out on the last four.
"It's obviously very tough from the start," he told Sky Sports.
"Tomas has had a great year. I've played him a few times this year and every time it's been very tough. It was the same again today.
"You need to, if you can, treat it like a knockout. If you win your first two matches you've got a good chance of progressing, so you just need to focus like it's the end of a major event.
"I managed to get the win today, but I have also won two matches here and not gone through a few years ago, when Del Potro beat me by like one game, so every game counts."
Murray was helped out by a vocal crowd at the O2 Arena as he made his first competitive appearance on British soil since winning the US Open title.
"That always helps," he said of the support. "I've played some big matches in London the last few months and the support has been great.
"Obviously having so many people watching helps get the adrenaline rush and push you through."