Marina Stakusic, a 19-year-old tennis player from Mississauga, Canada, achieved a major milestone by defeating top-seeded Jelena Ostapenko in the round of 16 at the Guadalajara Open, marking her first victory over a top 20 player. After being down 0-4 in the final set and saving four match points, she rallied to win 6-3, 5-7, 7-6, showcasing her resilience and determination. Earlier in the tournament, Stakusic had also secured a straight-sets victory over Anna Karolina Schmiedlova, demonstrating her strong performance throughout the event. This win propels her into the quarterfinals, where she will face the winner of a match between Ashley Krueger and Magdalena Frech. Despite a challenging season, Stakusic's recent successes highlight her potential on the WTA Tour. The Guadalajara Open is being played on hard courts at the Complejo Panamericano de Tenis.