Alexander Zverev seemed completely at a loss, the top German player snapped at his father in frustration - and then pulled himself together to an exhausting comeback victory: The Olympic tennis champion averted the threatening second-round knockout at the French Open with great effort.

The third in the world rankings from Hamburg defeated the initially furious Argentinian Sebastian Baez thanks to his strong physique 2: 6, 4: 6, 6: 1, 6: 2, 7: 5.

Zverev initially seems completely indisposed.

"I would shake him up, provoke him," said his brother Mischa, who suffered at Eurosport: "He's waiting for Baez to give him a chance, but you have to force it yourself."

The thoughts seemed to be transferred, because then the best German tennis player found the highest gear, fended off a match point and cheered after a hard piece of work.

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