Janu Koukalovi se v Jižní Americe daří, po týdnu (22.5.2010 zvítězil v Salvador Open) opět nenašel přemožitele a zvítězil na dalším PSA turnaji v brazilském Dourados s dotací 10 000 U$. Ve finále porazil Jan Koukal 37.hráče světového žebříčku Rafaelem Alarconem z Brazílie 3:1 na sety. Cestou do finále si Jan Koukal zopakoval i souboj s Eddie Charltonem, kterého porazil v závěrečném boji v San Salvadoru.
| Round One 26 May |
Quarters 27 May |
Semis 28 May |
Final 29 May |
| [1] Rafael Alarcon (Bra) w/o Vinicius Costa (Bra) |
[1] Rafael Alarcon 13/11, 11/9, 11/5 (38m) [6] Gonzalo Miranda |
[1] Rafael Alarcon
11/7, 11/4, 11/6 (32m) [3] Dylan Bennett |
[1] Rafael Alarcon
8/11 11/9 14/12 11/5 (72m) [2] Jan Koukal |
| [6] Gonzalo Miranda (Arg) 11/7, 14/12, 11/6 (32m) Juan Pablo Roude (Arg) |
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| [3] Dylan Bennett (Ned) 11/5, 11/4, 10/12, 11/6 (35m) Nahuel Ramos (Arg) |
[3] Dylan Bennett 11/6, 11/3, 9/11, 11/7 (47m) [5] Esteban Casarino |
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| [5] Esteban Casarino (Par) 10/12, 6/11, 13/11, 11/7, 11/9 (67m) [Q] Vinicius Rodrigues |
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| Abdul Ali Khan (Pak) 11/1, 11/9, 8/1 rtd (27m) [8] Tiago Cabral (Bra) |
[8] Tiago Cabral 11/6, 11/5, 11/6 (32m) [4] Eddie Charlton |
[4] Eddie Charlton
9/11, 11/9, 11/3, 11/3 (58m) [2] Jan Koukal |
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| [Q] Rodrigo Torres 11/3, 11/5, 11/4 (42m) [4] Eddie Charlton (Eng) |
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| [Q] Pedro Veiga 11/5, 11/6, 11/5 (34m) [7] Manoel Pereira (Bra) |
[7] Manoel Pereira 11/5, 11/3, 15/13 (41m) [2] Jan Koukal |
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| [Q] Ronivaldo Santos (Bra) 11/5, 11/6, 11/7 (30m) [2] Jan Koukal (Cze) |