Story highlights Johnson has reached French Open third round

The American's father recently died unexpectedly

He burst into tears after dramatic victory

(CNN) The second week of grand slams are where titles are won and history most often made. But the first week is where it all happens.

Early at this year's French Open, a 35-year-old Frenchman in his last year on tour -- Paul-Henri Mathieu -- had to go through qualifying for the first time in his Roland Garros career after being snubbed for a wildcard. The established Mathieu celebrated like he had won a major when he did make the main draw.

Tunisian lucky loser Ons Jabeur upset sixth-seed Dominika Cibulkova on Wednesday and, in the process, became the first Arabic woman to reach the third round of a grand slam, hours after Argentina's Renzo Olivo authored the biggest win of his career by ousting top men's French hope Jo-Wilfried Tsonga on the main Philippe Chatrier court.

He may never win a grand slam -- or even get to the second week -- but Olivo now has memories of his stint on one of tennis' most famous arenas to last a lifetime.

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