Netherlands: Middelburg - Singles - Main
1/16-finals Oostdam R. De Bakker T. 0:2 (2:6, 3:6) details 05.07.2012
Netherlands: Alkmaar - Singles - Main
1/16-finals Oostdam R. Sidorenko A. 0:0 RET. (2:5) details 20.06.2012
Netherlands: Zuidwolde - Singles - Main
1/16-finals Oostdam R. De Bakker T. 1:2 (5:7, 6:3, 2:6) details 12.06.2012
Turkey: Mersin 3 - Singles - Main
1/16-finals Micolani G. Oostdam R. 2:0 (6:3, 6:0) details 28.05.2012
Turkey: Mersin 2 - Singles - Main
1/16-finals Oostdam R. Reynet F. 1:2 (3:6, 7:5, 3:6) details 22.05.2012
Israel: Herzlia 3 - Singles - Main
1/16-finals Bossel A. Oostdam R. 2:0 (6:4, 6:1) details 26.03.2012
Israel: Herzlia 2 - Singles - Main
1/16-finals Oostdam R. Rosenholm P. 0:0 RET. (1:5) details 20.03.2012
Israel: Herzlia - Singles - Main
Quarter-finals Fitzpatrick A. Oostdam R. 2:1 (1:6, 6:4, 7:5) details 15.03.2012
1/8-finals Semjan M. Oostdam R. 1:2 (65 :7, 7:63 , 5:7) details 14.03.2012
1/16-finals Oostdam R. Dubail J. 2:0 (7:6, 6:4) details 13.03.2012
Turkey: Antalya 5 - Singles - Qualification
Final Borgo F. Oostdam R. 2:0 (6:4, 6:3) details 06.02.2012
Semi-finals Farin K. Oostdam R. 1:2 (3:6, 6:4, 1:6) details 05.02.2012
Quarter-finals Toyoshima K. Oostdam R. 0:2 (1:6, 3:6) details 05.02.2012
Mexico: Guadalajara - Singles - Main
Quarter-finals Gray W. Oostdam R. 2:0 (7:5, 6:2) details 16.12.2011
1/8-finals Oostdam R. El M. A. 2:1 (5:7, 6:3, 6:0) details 15.12.2011
1/16-finals Oostdam R. Serrano S. 2:0 (6:4, 7:63 ) details 13.12.2011
Mexico: Tehuacan - Singles - Main
1/16-finals Oostdam R. Garza D. 0:2 (2:6, 3:6) details 07.12.2011
Mexico: Ixtapa - Singles - Main
Semi-finals Oostdam R. Garza D. 0:2 (6:7, 2:6) details 03.12.2011
Quarter-finals Oostdam R. Gallardo-Valles M. 2:0 (6:2, 7:6) details 02.12.2011
1/8-finals Oostdam R. Ramirez C. 2:0 (6:4, 6:4) details 01.12.2011
1/16-finals Diaz-Barriga L. Oostdam R. 0:2 (4:6, 5:7) details 30.11.2011
Spain: Vic - Doubles - Main
1/8-finals Bos J./Oostdam R. Reda M./Sloane R. WO. details 24.04.2012
Israel: Herzlia 3 - Doubles - Main
Quarter-finals Oostdam R./Silva C. Allemby J./Djurdjevic B. 1:2 (6:4, 65 :7, 2:10) details 28.03.2012
1/8-finals Oostdam R./Silva C. Cohen E./Smilansky I. 2:1 (5:7, 6:2, 10:7) details 26.03.2012
Israel: Herzlia 2 - Doubles - Main
Quarter-finals Benneteau A./Michon A. Oostdam R./Silva C. 2:0 (6:1, 6:0) details 21.03.2012
1/8-finals Mazor N./Ram Harel O. Oostdam R./Silva C. 0:2 (2:6, 2:6) details 19.03.2012
Israel: Herzlia - Doubles - Main
Quarter-finals Oostdam R./Silva C. Fitzpatrick A./Jones J. 0:2 (63 :7, 63 :7) details 14.03.2012
1/8-finals Oostdam R./Silva C. Darmon A./Peleg E. 2:0 (6:3, 6:3) details 12.03.2012
Netherlands: Enschede - Doubles - Main
Quarter-finals Brons B./Oostdam R. Fransen S./Koolhof W. 0:2 (5:7, 3:6) details 24.08.2011
1/8-finals Brons B./Oostdam R. Roessing M./Zay M. 2:0 (6:4, 7:6) details 22.08.2011