Gunthardt Heinz / Rosset Marc (Switzerland / Switzerland)
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 Switzerland: Gstaad - Doubles - Main | |||||||
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| Quarter-finals | Casal S./Sanchez E. | Gunthardt H./Rosset M. | 2:0 (7:6, 6:3) | details | 11.07.1990 | ||
| 1/8-finals | Gunthardt H./Rosset M. | Colombini U./Carbonell T. | 2:1 (4:6, 7:6, 6:1) | details | 09.07.1990 | ||