 Complete the following phrase:  Between 1969 and 1973 Zaiga Jansone, paired with Olga Morozova, won the Soviet tennis championships in womens doubles five times in a row. In 1970 she also met Morozova in the singles finals but lost 46, 36. 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 