French Open tennis - 'Monstrous!' - Stefanos Tsitsipas stunned by John Isner return in opening game

'Monstrous!' - Stefanos Tsitsipas is left stunned by a huge John Isner return of serve in the opening game of their match. Watch all the action from the 2021 French Open live on Eurosport, eurosport.co.uk and the Eurosport app with 13-time champion Rafael Nadal eyeing a remarkable 14th title and 2020 Roland Garros sensation Iga Swiatek aiming to replicate her stunning triumph.