Doha: Nikolay Davydenko and Ivan Ljubicic advanced on Tuesday to the second round of the Qatar Open. Davydenko, top seed and world No 3, beat South Korea's Lee Hyun-taik 7-5, 6-4."I am not thinking about the world number one ranking as yet because this is my first match of the season," the Russian said afterward.Ljubicic, seeded second, had an easier time with a 6-1, 6-2 win over qualifier Denis Gremelmayr of Germany in just 58 minutes with powerful serving and baseline play."It was a good win," Ljubicic said. "I am happy with my performance especially as I have recovered from last season's illness."Ljubicic had a viral attack in November, forcing him to pull out of the Paris Masters. "Hopefully I can keep up this form through the season," Ljubicic said.Morocco's Younes El Aynaoui, given a wild card here, was a surprise winner over former Australian Open champion Thomas Johansson of Sweden.Johansson, the fifth seed, lost 7-6 (5), 7-6 (1) to an opponent returning from injury and ranked 189th in the world.Two other seeds also lost. Belgium's Olivier Rochus defeated seventh-seed Sebastien Grosjean of France 6-4, 6-4, and Max Mirnyi of Belarus beat Switzerland's Stanislas Wawrinka, seeded eighth, 5-7, 6-4, 6-4.In other games, Federico Luzzi of Italy beat Jurgen Melzer of Austria 5-7, 6-4, 7-5 and Sweden's Jonas Bjorkman ousted Nicolas Almagro of Spain 7-5, 7-5.