The Bayern Munich man has been plagued by injuries over the past few seasons, but played 90 minutes against Dortmund and believes he can return to his best.
Javi Martinez has his sights set on making the Spain squad for Euro 2016 as he approaches a return to peak condition.
The 27-year-old has been plagued by injuries in the past two seasons and featured just three times for Bayern Munich in 2014-15 due to a knee problem.
After returning to training in early September, the former Athletic Bilbao midfielder played the full 90 minutes for the first time this season in Bayern's 5-1 win over Borussia Dortmund before the international break.