Andy Murray
Andy Murray is a step closer to booking his ATP Finals spot (Getty Images/Chris Hyde)

Andy Murray has boosted his chances of qualifying for the ATP World Tour Finals after sealing a spot in the semi-finals of the Vienna Open with victory over Lennard Struff.

After easing past Vasek Pospisil in the second round on Thursday 16 October, the British number one secured a 6-2 7-5 over his German opponent to set up a final-four meeting with Serbia's Viktor Troicki.

Struff rescued two break points in his opening service game before Murray took a double break to clinch the first set.

Murray was put under pressure in the second after losing his serve but responded in emphatic fashion by breaking his opponent in the following game. Another break soon followed allowing the 27-year-old to push on and seal the win in the Austrian capital.

Murray currently sits 10th in the ATP rankings with the top eight qualifying for the Finals, which take place at London's O2 Arena in November.

In a bid to secure his spot in the season finale, Murray is taking part in back-to-back competitions over the coming weeks, competing in the Valencia Open next week before the Race to London concludes at the Paris Open.

David Ferrer, who sits a place ahead of Murray in ninth with a 60 point advantage, is also in action in Vienna and takes on Ivo Karlovic in his quarter-final match on Friday 17 October.

Novak Djokovic, Roger Federer, Rafael Nadal, Stan Wawrinka and Marin Cilic have all secured their places in the Finals at the O2 Arena in November, although doubts over Nadal's fitness suggests that line up could change.