Between 1969 and 1973 Zaiga Jansone, paired with Olga Morozova, won the Soviet tennis championships in women's doubles five times in a row. In 1970 she also met Morozova in the singles finals but lost 4–6, 3–6. Between 1969 and 1973 Morozova and Zaiga (who by 1973 was playing under family name Jansone-Ivanova) also won the European amateur championships four times and 1973 Summer Universiade in women's doubles.