Career
Schwaier was runner-up to Thomas Högstedt in the boy"s singles at the 1981 United States Open, the same year he also reached the Wimbledon semi-finals and made it to number three in the world junior rankings. The West German turned professional in 1983 and was semi-finalist at Kitzbühel that year. He reached the semi-finals at Barcelona in 1984 and en route defeated world number 14 Tomáš Šmíd, for the second time in the space of two months.
His best year was 1985, when he made his only Grand Prix final, at the 1985 Bayerische Motoren Werke Open and also reached the semi-finals in Bari and Nice, as well as making it to the quarter-final stage in Basel and Indianapolis.
He defeated the 11th ranked player in the world, Andrés Gómez, at Rome in 1986. From 1984 to 1986 he participated in the main draw of every Grand Slam event, except Australian Opens.
His other appearances came in the 1987 French Open and 1990 French Open. He had his best result in the 1985 United States Open, where he reached the third round, with wins over Balázs Taróczy and Tony Mmoh.
On four occasions during his career, Schwaier was eliminated from a Grand Slam tournament after losing a five set match.
In his second rubber, Schwaier lost to Eliot Teltscher, but Boris Becker would secure the tie for West Germany. Singles: (3).