Forgive the tennis fans at Madison Square Garden if they're secretly hoping to see Pete Sampras fire a serve at Andre Agassi's head. The two exhibition matches Monday night offer more than the chance to see four greats with 37 combined Grand Slam titles. For guys who are long retired, there's still an edge in the air for the Sampras-Agassi and John McEnroe-Ivan Lendl rivalries. More...