Dusseldorf - Wild-card entry Dustin Brown has upset fifth-seeded Lu Yen-Hsun of 7-6 (3), 6-2 in the first round of the Dusseldorf Open on Monday.
Another seeded player fell when No. 8 Igor Sijsling lost to Jiri Vesely 7-6 (2), 6-3.
Juergen Melzer continued his comeback from injury by defeating Pablo Carreno Busta 6-4, 6-1, and Teymuraz Gabashvili rallied to defeat Dusan Lajovic 3-6, 6-3, 6-4.
Wild-card entry Nikola Milojevic outlasted qualifier Mirza Basic 6-2, 5-7, 6-4.
The red-clay event is a warm-up for the French Open, the second Grand Slam of the year.
Results on Monday from the ATP Dusseldorf tournament (x denotes seeding):
Teimuraz Gabashvili (RUS) bt Dusan Lajovic (SRB) 3-6, 6-3, 6-4
Dustin Brown (GER) bt Lu Yen-Hsun (TPE x5) 7-6 (7/3), 6-2
Jir Vesel (CZE) bt Igor Sijsling (NED x8) 7-6 (7/2), 6-3
Jurgen Melzer (AUT) bt Pablo Carreo (ESP) 6-4, 6-1
Nikola Milojevic (SRB) bt Mirza Basic (BIH) 6-2, 5-7, 6-4