TBH, I think the Tipsarevic retirement thread is pretty ridiculous, or at the very least, blinkered by the person who started it.
Mofils and Almagro have had 11 and 10 retirements respectively, and Roddick has 15.
Monfils(11):
18/2011 ATP Madrid (ESP) Clay Juan Monaco Gael Monfils 6-2 3-0 ret. Second
28/2010 ATP Stuttgart (GER) Clay Albert Montanes Gael Monfils 6-2 1-2 ret. Final
41/2009 ATP Shanghai (CHN) Hard Ivan Ljubicic Gael Monfils 6-2 3-0 ret. Third
3/2009 ATP Australian Open (AUS) Hard Gilles Simon Gael Monfils 6-4 2-6 6-1 ret. Fourth
31/2008 ATP Cincinnati (USA) Hard Tommy Haas Gael Monfils 5-1 ret. Second
19/2008 ATP Rome (ITA) Clay Olivier Patience Gael Monfils 6-3 1-0 ret. Qualifying
38/2007 CH Szczecin (POL) Clay Jan Mertl Gael Monfils 6-3 2-0 ret. First
16/2007 ATP Monte Carlo (MON) Clay Radek Stepanek Gael Monfils 6-0 2-0 ret. First
42/2006 ATP Madrid (ESP) I_Hard Dominik Hrbaty Gael Monfils 3-6 2-2 ret. First
24/2006 ATP London (GBR) Grass James Blake Gael Monfils 6-1 ret. 1/4
27/2005 ATP Bastad (SWE) Clay Tommy Robredo Gael Monfils 6-4 4-2 ret. Second
http://matchstat.com/PlayerInjuries/5917
Almagro(10):
24/2010 ATP Eastbourne (GBR) Grass Denis Istomin Nicolas Almagro 6-4 1-0 ret. Second
10/2010 ATP Indian Wells (USA) Hard Andy Murray Nicolas Almagro 6-2 1-0 ret. Fourth
28/2008 ATP Stuttgart (GER) Clay Michael Berrer Nicolas Almagro 7-5 ret. Second
19/2008 ATP Rome (ITA) Clay Novak Djokovic Nicolas Almagro 6-1 1-0 ret. 1/4
8/2008 ATP Buenos Aires (ARG) Clay Juan Ignacio Chela Nicolas Almagro 6-3 2-1 ret. 1/4
37/2007 ATP Bucharest (ROU) Clay Simone Bolelli Nicolas Almagro 4-6 5-1 ret. First
16/2007 ATP Monte Carlo (MON) Clay Tomas Berdych Nicolas Almagro 5-0 ret. First
44/2006 ATP Paris (FRA) Carpet Dmitry Tursunov Nicolas Almagro 6-3 5-4 ret. Second
39/2006 ATP Palermo (ITA) Clay Filippo Volandri Nicolas Almagro 6-0 2-1 ret. 1/2
40/2004 CH Seville (ESP) Clay Alexander Waske Nicolas Almagro 5-2 ret. 1/2
http://matchstat.com/PlayerInjuries/4045
Roddick (15)
All ret. & w/o matches
3/2012
ATP Australian Open (AUS)Hard
Lleyton HewittAndy Roddick
3-6 6-3 6-4 ret.Second
41/2010
ATP Shanghai (CHN)Hard
Guillermo Garcia-LopezAndy Roddick
3-6 3-2 ret.Second
41/2009
ATP Shanghai (CHN)Hard
Stanislas WawrinkaAndy Roddick
3-4 ret.Second
23/2009
ATP London (GBR)Grass
James BlakeAndy Roddick
4-4 ret.1/2
19/2008
ATP Rome (ITA)Clay
Stanislas WawrinkaAndy Roddick
3-0 ret.1/2
12/2007
ATP Miami (USA)Hard
Andy MurrayAndy Roddick
5-3 ret.1/4
30/2006
ATP Los Angeles (USA)Hard
Dmitry TursunovAndy Roddick
w/o1/4
22/2006
ATP French Open (FRA)Clay
Alberto MartinAndy Roddick
6-4 7-5 1-0 ret.First
21/2006
ATP Dusseldorf (GER)Clay
Nicolas MassuAndy Roddick4-2 ret.Robin
12/2005
ATP Miami (USA)Hard
Fernando VerdascoAndy Roddick
7-6(9) 4-3 ret.Second
7/2005
ATP Memphis (USA)I_Hard
Kenneth CarlsenAndy Roddick
w/o1/2
10/2003
ATP Delray Beach (USA)Hard
Mardy FishAndy Roddick
7-6(4) 4-3 ret.First
3/2002
ATP Australian Open (AUS)Hard
Ivan LjubicicAndy Roddick
7-6(11) 3-2 ret.Second
39/2001
ATP Hong Kong (CHN)Hard
Andre SaAndy Roddick
6-3 4-6 3-3 ret.First
22/2001
ATP French Open (FRA)Clay
Lleyton HewittAndy Roddick
6-7(6) 6-4 2-2 ret.Third