Argentinos Juniors defender Luciano Sanchez broke his leg after being accidentally stomped by Fluminense left-back Marcelo during a Copa Libertadores game in Buenos Aires. The incident came when, while trying to make an attempt with the ball, Marcelo accidentally stepped on Sanchez's leg. The Argentines player was already hobbling and Marcelo called off in tears after he was sent off too energetically.

The score finished 1-1, with Gabriel Avalos scoring for Argentinos Juniors and Samuel Xavier equalizing for Fluminense. The nearby teammates and Fluminense players looked visibly upset as they watched their teammate lie on the pitch receiving medical treatment.

Later, after the game, Marcelo took to social media regretting injuring his colleague and gave him best wishes for a speedy recovery. The incident remains as one of tragic kind that left both players shaken up.

On Aug 8th, the two top-ranked teams will meet again at the Maracana Stadium for the decisive match to see which nation will book a place in the quarterfinals of an extraordinarily proud competition. Players' performances, together with their safety and enjoyment of this occasion, obviously key issues in any result.