Here are some interesting stats regarding the WTFs:
ALL-TIME MATCH WINS LEADERS
Pos Player W-L Pct.
1 Roger Federer 39-7 .848
= Ivan Lendl 39-10 .796
3 Boris Becker 36-13 .735
4 Pete Sampras 35-14 .714
5 Illie Nastase 23-3 .885
6 Andre Agassi 22-20 .524
7 John McEnroe 19-11 .633
8 Stefan Edberg 18-14 .563
= Jimmy Connors 18-18 .500
10 Bjorn Borg 16-7 .696
= Guillermo Vilas 16-12 .571
BEST WINNING PERCENTAGE
Pos Player Pct. W-L
1 Ilie Nastase .885 23-3
2 Roger Federer .848 39-7
3 Ivan Lendl .796 39-10
4 Brian Gottfried .750 9-3
5 Boris Becker .735 36-13
6 Lleyton Hewitt .722 13-5
7 Pete Sampras .714 35-14
8 Bjorn Borg .696 16-7
9 Stan Smith .684 13-6
10 John McEnroe .633 19-11
TITLE LEADERS
Pos Player No. Years
1 Roger Federer 6 2003-04, '06-07, '10-11
2 Ivan Lendl 5 1981-82, '85-'87
= Pete Sampras 5 1991, '94, '96-97, '99
4 Ilie Nastase 4 1971-73, '75
5 Boris Becker 3 1988, '92, '95
6 John McEnroe 3 1978, '83-84
7 Lleyton Hewitt 2 2001-2002
8 Bjorn Borg 2 1979-80
MOST YEARS QUALIFIED
Pos Player No. Years
1 Andre Agassi 14 1988-91, '94, '96, '98-03
2 Ivan Lendl 12 1981-91
3 Boris Becker 11 1985-92, '94-96
= Jimmy Connors 11 1972-73, '77-84, '87
= Roger Federer 11 2002-2012
= Pete Sampras 11 1990-2000
7 Stefan Edberg 9 1985-90, '92-94
= John McEnroe 9 1978-85, '89
9 Guillermo Vilas 8 1974-77, '79-82
= Rafael Nadal 8 2005-2012
= Andy Roddick 8 2003-2010