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Sue Barker introduces live coverage from Wimbledon as Great Britain face Austria in the Davis Cup World Group play-offs.

Britain are bidding to avoid relegation from the competition's top tier following February's 4-1 loss to Argentina, and will be relying on Andy Murray to give them a winning start in today's singles.

Austria will be pinning their hopes on Stefan Koubek and Jurgen Melzer, both ranked in the top 100, buoyed by the fact they won 3-2 in the last encounter between the two nations in 2004.