Over the last few decades, if there are incidents of attacking refs, flares thrown on the field, incidents in the crowd to disrupt matches, or pitch invasions, it's a good chance one or all are happening at a Copa Libertadores knockout stage match.
Tonight, no exception. Round of 16 match abadoned as River Plate players were sprayed by some sort of irritant by Boca Junior fans on way back to the field for the second half.
http://www.goal.com/en-us/news/3297/...after-apparent