After boxing's biggest bout proved to be something of a damp squib, Goal takes a look at some other high-profile showdowns which failed to live up to the hype.
World Cup 2014
Sunday, May 3, 2015
Saturday, April 25, 2015
The Salvadoran referee says he was praised for letting the U.S. and Costa Rica play on, though he initially worried it would cost him a chance to call World Cup matches.