As of September 2, 2026, Polymarket prices “US Open ATP: Lloyd Harris vs Stefanos Tsitsipas” at 59% YES with $186K traded. No tracked smart-money wallet holds a position on this market yet.
Prediction markets put the probability at 59%: US Open ATP: Lloyd Harris vs Stefanos Tsitsipas. Currently, markets are divided (59% YES, 41% NO). Prediction markets / Tennis / US Open (M) Harris vs Tsitsipas L.
Stefanos Tsitsipas, the former world No. 3 from Greece, advanced to the second round of the US Open ATP: Lloyd Harris vs Stefanos Tsitsipas matchup after upsetting 10th-seeded Arthur Fils of France in the first round on Monday, Aug 31. The win was Tsitsipas's first significant result at a major since reuniting with coach Patrick Mouratoglou in June 2026, a partnership that also includes daily coach Thomas Perrin and produced the Gstaad ATP 250 title in July, his only trophy of the season. Tsitsipas currently sits at ATP No. 53, having dropped 10 ranking places over the past six months. [Tennis Majors, Aug 31]
His opponent, South African qualifier Lloyd Harris, reached the main draw of the US Open ATP: Lloyd Harris vs Stefanos Tsitsipas tie by winning three consecutive qualifying matches in Flushing. Ranked No. 139 but rising 13 places over the past six months, the 29-year-old Harris has prior success at the venue, having reached the US Open quarterfinals in 2021. Both players stand 193cm tall, with Harris listed at 80kg and Tsitsipas at 90kg. The two have no prior head-to-head meetings on the ATP Tour, adding uncertainty to a second-round pairing between a resurgent seed and an in-form qualifier. [Newsday, Aug 30]
Contract pricing on Robinhood as of Aug 31 listed Tsitsipas at 69¢ and Harris at 32¢, reflecting the Greek's status as favorite despite the qualifier's local pedigree. Associated game-spread contracts offered Tsitsipas -1.5, -4.5, and -7.5 games lines. Trading on the event runs 24 hours a day, except Thursday 3AM–5AM ET. The winner of the second-round match advances deeper into the men's singles draw at the 2026 US Open, where Monday's result gave Tsitsipas early evidence that his rebuilt coaching setup can translate to Grand Slam play. [Robinhood, Aug 31]
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