ANDY Murray struggled but eventually overcame German qualifier Michael Berrer at the Dubai Championships.The Briton, ranked fourth in the world, won 6-3 4-6 6-4 in his first match since last month’s Australian Open semi-final defeat by Novak Djokovic."It was a frustrating match because I was up a break in the second set, and I gave it back,” said Murray.Djokovic, the defending champion, began his campaign on Monday with a 6-4 6-2 win over Germany’s Cedrik-Marcel Stebe.Roger Federer and Juan Martin Del Potro also made it through in straight sets.Murray is in the same half of the draw as Djokovic.The British number one will now face another qualifier, Switzerland’s Marco Chiudinelli, in round two.World number 185 Chiudinelli advanced after beating Russia’s Nikolay Davydenko 6-4 5-7 6-4 w while Del Potro, who is seeded eighth, beat Ukranian Alexandr Dolgopolov 6-3, 7-6 (5).Fourth seed Jo-Wilfried Tsonga survived a tight match against Marcos Baghdatis, beating the 46th-ranked Cypriot 7-6 (7-2) 6-4 to set up a second-round encounter with Lukas Rosol of the Czech Republic.