5 instances of tennis players getting disqualified 

#2 Tim Henman - 1995

Henman

apologised

to the ball girl

A few years before challenging the top tennis stars at Wimbledon, Tim Henman suffered a setback in 1995 during a doubles match.

Playing alongside Jeremy Bates, they were up to two sets to one against Jeff Tarango and Henrik Holm. During the fourth set tie-break, after missing a net-cord, Henman lashed out at a ball in anger, which ended up hitting a ball-girl on the head.

After a consultation with the match referee, Henman and Bates were defaulted from the match.

#1 John McEnroe - 1990

McEnroe Arguing

This is probably one of the most famous tennis outbursts of all-time. American John McEnroe was disqualified from the match at the Australian open after he received three code-violations.

In the fourth round of the Australian Open in 1990, he was up against Mikael Pernfors. After exchanging one set each, McEnroe was leading 2-1 in the third set when he received his first code violation for unsportsmanlike conduct after intimidating a lines-woman

The second and third violations came in the fourth set when he was down a break at 2-4. The second one was for racket abuse and the third one was for verbal abuse.