No. 1 seed Emma Raducanu advanced to the second round of the Zavarovalnica Sava Portoroz when her first-round opponent, Dayana Yastremska of Ukraine, retired Monday night in Portoroz, Slovenia.
Raducanu was already two points away from winning the match at the time. She led 6–2, 5–3, 30–0, having saved three of four break points while converting four of her five opportunities to break Yastremska’s serve.
No. 2 seed Beatriz Haddad Maia of Brazil opened with a 7–6 (3), 6–3 win over Clara Tauson of Denmark. Haddad Maia served up four aces and converted five of eight break points.
No. 5 seed Ekaterina Alexandrova of Russia beat Ukraine’s Marta Kostyuk 7–6 (5), 5–7, 7–5, despite committing 14 double faults. And No. 9 seed Anastasia Potapova, also from Russia, needed almost two hours for a straight-sets win over Claire Liu of the United States, 6–4, 7–6 (5)….