Top seed Nikolay Davydenko [ Images ] of Russia [ Images ] and Spaniards David Ferrer and Juan Carlos Ferrero [ Images ] fell in a trio of first round shocks at the Valencia Open on Tuesday.

Davydenko, who had pulled out of his singles rubber on Sunday in Russia's Davis Cup quarter-final win over France [ Images ] due to injury, lost 7-5, 7-5 to Czech opponent Jan Hernych on the Spanish clay.

Another of Russia's Davis Cup players, wild card entrant Marat Safin [ Images ], enjoyed a 7-6, 6-4 victory over his compatriot Igor Andreev.

Ferrer, the third seed, retired with back pain after losing a first set tiebreak against France's Thierry Ascione 7-1.

In another upset Spain's Nicolas Almagro defeated former world number one Ferrero, the fourth seed, 6-7, 6-4, 6-4 to reach the second round.

(Writing by Bill Barclay in London [ Images ])