Former world number one Rafa Nadal admitted he has struggled of late to rekindle his passion for tennis on Thursday after defeat by Jo-Wilfried Tsonga sent him spinning out of the ATP World Tour Finals at the group stage.,beats by monster

The 25-year-old Spaniard ended 2010 as the dominant force in men's tennis after completing his career grand slam but apart from a sixth French Open crown in June,monster beats, this year has been a disappointing one by his sky-high standards.

His 7-6 4-6 6-3 defeat by French powerhouse Tsonga came just two days after he was thrashed in an hour by great rival Roger Federer and the zip and spark is clearly missing from his game.