Trivia question on wins over #1

[mick1303]

Recent Meddy win made me look into "wins over #1 player" stats. It was his 7th such win and he has wins over 3 different #1s. In the latter stat he joined rather long list of players who beaten 3 different #1 players (now 22 players).
There are only 7 players who are better in this particular stat:
Becker has wins over 6 different #1s
Chang and Agassi have wins over 5 different #1s
Djokovic, Federer, Sampras and one more player has wins over 4 different #1s

Who is that other player who I did not name?

[patrick]

Courier. However, I have a feeling that the answer is an outsider.

[atlpam]

Canas?

[mick1303]

So far the answers are incorrect

[dave g]

Lendl (my guess)

[mick1303]

Lendl is high on the list of total wins against #1s. With his 14 wins he is #4 behind Nadal, Becker and Djokovic. But he beat only 3 different #1s.

[mick1303]

I have to stress that wins are counted only if the opponent was #1 at the time of the match. Wins over former or future #1s do not count.

[jazzyg]

Nalbandian?

[atlpam]

Mats Wilander

[ponchi101]

Richard Krajicek?

[mick1303]

Nope. None of the above

[Oploskoffie]

Del Potro?

[Owendonovan]

Vince Spadea

[atlpam]

Rios?

[atlpam]

Brad Gilbert, Mr. Winning Ugly?