Greece's Stefanos Tsitsipas plays a forehand return to Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Argentinia's Francisco Cerundolo plays a forehand return to Greece's Stefanos Tsitsipas during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Greece's Stefanos Tsitsipas plays a forehand return to Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Argentinia's Francisco Cerundolo plays a forehand return to Greece's Stefanos Tsitsipas during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

TOPSHOT - Greece's Stefanos Tsitsipas eyes the ball as he plays a backhand return to Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Greece's Stefanos Tsitsipas plays a forehand return to Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Greece's Stefanos Tsitsipas plays a forehand return to Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)

Greece's Stefanos Tsitsipas reacts as he plays against Argentinia's Francisco Cerundolo during the Monte Carlo ATP Masters Series Tournament round of 64 tennis match on Court Rainier III at the Monte-Carlo Country Club in Roquebrune-Cap-Martin, south-eastern France on April 6, 2026. (Photo by Valery HACHE / AFP via Getty Images)