https://es.wikipedia.org/wiki/Otto_Virtanen
Otto Virtanen - Wikipedia, la enciclopedia libre
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https://www.rolandgarros.com/en-us/players/41774-o.virtanen
Otto VIRTANEN - Tennis Titles, Ranking & Profile
Otto VIRTANEN's Profile: biography, titles, rankings, statistics and tennis news
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https://www.straitstimes.com/sport/tennis/carlos-alcaraz-beats-otto-virtanen-in-barcelona-open-first-round
Carlos Alcaraz beats Otto Virtanen in Barcelona Open first round | The Straits Times
Apr 15, 2026 - He can reclaim top spot if he triumphs this week in Barcelona, as he did in 2022 and 2023. Read more at straitstimes.com.