https://www.youtube.com/watch?v=EK3RhhQMKDk Could we have seen this in 1989? Michael Chang’s improbable 1989 French Open title is one of the great underdog stories in the history of tennis.  The 17-year-old Chang rallied from two sets down to beat the #1 seed, world #1, and three-time French Open champion Ivan Lendl.  He followed that up with 4-set…