WTA
January 30, 2017: The day a pregnant Serena Williams became the oldest woman in history to hold the world No 1 ranking
Every day, Tennis Majors goes back in time to look at a landmark event on the tennis world. Today, we return to 2017 to see how, at the age of 35, Serena Williams, who had just won the Australian Open, became the oldest world No 1 in the history of women's tennis
Singapore Open: Wang eases past Joint to make last eight
Xinyu Wang beat Maya Joint 6-4, 6-2 on Thursday afternoon and will play the winner of the match between Olivia Gadecki and Jil Teichmann in the next round
Singapore Open: Mertens battles past Maria and into quarter-finals
Elise Mertens won against Tatjana Maria 6-7 (3), 6-3, 6-1 on Thursday and will play Colombian Camila Osorio, the No 6 seed, in the next round
Upper Austria Ladies: Potapova too strong for Sramkova, moves into quarter-finals
Anastasia Potapova beat Rebecca Sramkova 7-6 (1), 6-4. She'll play either Karolina Muchova and Sara Sorribes Tormo in the next round
Upper Austria Ladies: Third seed Sakkari rolls into last 8
Maria Sakkari won against Viktoriya Tomova 6-3, 6-2 on Wednesday evening and will play the winner of the match between Ukrainian Dayana Yastremska, the No 5 seed, and Croat qualifier Antonia Ruzic in the next round
Upper Austria Ladies: Martic edges past wildcard Lys to move into second round
Upper Austria Ladies: Sasnovich defeats qualifier Zakharova to reach second round
Upper Austria Ladies: Potapova too good for wildcard Grabher, moves into second round
Upper Austria Ladies: Sorribes Tormo eases past Lulu Sun to reach second round
Singapore Open: Mertens crushes Townsend to reach second round
Singapore Open: Timofeeva beats Wang to move into second round
Singapore Open: Baptiste fights back to beat Zarazua and reach second round
Upper Austria Ladies: Tauson eases past Kalinina to make second round
Singapore Open: Wang defeats Marino to move into second round
Singapore Open: Gadecki battles past Uchijima to book spot in second round
Singapore Open: Birrell eases past Polina Kudermetova to make second round
Upper Austria Ladies: Cirstea fights back from a set down to progress into second round
Upper Austria Ladies: Tomova recovers from double break deficit to progress
Singapore Open: Kalinskaya comes through Dolehide test to advance into second round
Singapore Open: Qualifier Waltert through to second round via win over Tomljanovic