Table:
text: Karel Nováček
Singles performance timeline
Singles performance timeline
Tournament _1984 _1985 _1986 _1987 _1988 _1989 _1990 _1991 _1992 _1993 _1994 _1995 _1996 Career_SR
US Open A A 1R 1R A A 1R 3R A 3R SF 1R A 0 / 7
Grand Slam SR 0 / 1 0 / 1 0 / 3 0 / 3 0 / 2 0 / 2 0 / 4 0 / 4 0 / 3 0 / 3 0 / 4 0 / 4 0 / 0 0 / 34
ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series ATP Masters Series

Question: What is 1990 when 1991 ATP Masters Series is on Karel Nováček's singles performance timeline?