Last Grand slam Nadal lost where he clearly wasnt injured?
All Grand slams I can remember Nadal lost because he was injured or extremly fatigued:
2011 AO Nadal fights with one leg against Ferrer
2010 AO Nadal retires against Murray with injury
2009 UO Nadal clearly was destroyed by Del Potro because he was injured
2009 RG Nadal obviously lost to Soderling with an injury
2008 UO Nadal was extremly fatigued against Murray because of the olympics and the schedule
2008 AO I am not sure here is the injury excuse was used when Nadal was destroyed by Tsonga, do you remember what was the reaston Nadal lost this match?
2007 UO Nadal was supposed to once again be injured against Ferrer in R4
2007 Wimbledon Nadal was tired by the schedule and rains, unfair schedule gave Federer this victory (despite Djokovic retiring in the SF against Nadal after 1 hour)
2007 AO Gonzalez destroys an injured Nadal, remember this one really well
2006 UO Youzhny defeated an injured Nadal...
Here is the one I clearly remember Nadal losing without any injury excuses:
2006 Wimbledon Federer fairly defeats an unexperienced Nadal
In which matches Nadal was clearly injured?
I would say I could clearly see Nadal was injured:
2010 AO (only the 3rd set, Murray would destroy him anyway)
Maybe 2007 Australian open he was tired after 5 sets against Murray but Gonzalez would still destroy Nadal the way he was playing in that tournament.