Serena Williams as he took to the Arthur Ashe Stadium court for his US Open clash with Rafael Nadal. The American stepped out wearing the 'GOAT' hoodie made by her official Serena brand just days after the 23-time Grand Slam champion played her final match on the same court, losing to Ajla Tomljanovic in three sets. Tiafoe is playing on the US Open's main showcourt for the first time this tournament as he faces Nadal for a spot in the quarter-finals.