With only two weeks left to fill the final places for the WTF season showpiece event at the O2 arena in London, Andy Murray has forced his way into the top eight with victory in Vienna.

The Scot defeated rival David Ferrer to claim his second tour title in a month and has already made it to the quarter finals of the Valencia Open event this week. Murray is now in pole position after seventh-placed Tomas Berdych crashed out to Pablo Andujar on day one in Valencia.

The Czech travelled to Spain on a high after securing the IF Stockholm Open title on Sunday but was unable to carry his form into the 500 event. This gives Murray a great chance of breaking into the top five if he can continue his winning form with victory in Spain.

There are just three places left for the London event as Novak Djokovic, Rafael Nadal, Roger Federer, Stan Wawrinka and Marin Cilic are all already guaranteed to finish in the top eight. Kei Nishikori looks certain to take one of those places leaving just two spots up for grabs.

With Grigor Dimitrov lagging behind, it looks like a straight battle between Murray, Ferrer, Berdych and Raonic for the final two places with Murray the favourite to feature at the O2 in November. Raonic is playing at the Swiss 500 tournament in Basel and has already made it to the quarter-finals. He started the week just 25 points behind Ferrer and will need to overtake the Spaniard to book a ticket for the World Tour Finals.

Raonic slipped out of the top eight after retiring injured in Shanghai and then falling at the first hurdle in Moscow. He faces a potential semi-final clash with Rafa Nadal in Basel.

Once this weekend’s tournaments are concluded, all eyes will be on the Paris Masters as the Race to London goes down to the wire.

Njovak Djokovic is 11/8 favourite to lift the crown in London ahead of Roger Federer, who is currently 5/2. The bookies have taken notice of Murray’s recent form and he is now joint third favourite with Rafa Nadal at 11/2. The British player has only been back in action for 10 months after four months out after back surgery and seems to be finding form at just the right time.