Last year, he withdrew from the tournament ahead of his third-round match because of a wrist injury.
Nara has failed to set pulses racing so far this year, however, the highlight of her season being a win over Serbia's Jelena Jankovic in Taipei. "But I feel good and happy that I am back". The French Open 2017 will end on June 11.
The 11th-seeded Dane will next face American teenager CiCi Bellis.
Defending champion and No. 4 seed Garbine Muguruza of Spain held on to beat Anett Kontaveit Estonia 6-7 (4), 6-4, 6-2 to reach the third round.
Fourth-seeded Rafael Nadal is facing Robin Haase of the Netherlands in the second round.
The American, ranked 117, then recovered from 4-2 down to win the tie-break before taking a 10-minute break for treatment to her thigh.
Williams plans on resuming her career in 2018.
It turned into a fine hour or so at the start of the day for the two oldest women left in the singles draw at this year's French Open.
A year ago at the French Open, Serena Williams advanced to the final, losing to Garbine Muguruza.
The Austrian will have some concerns as he goes forward in the tournament, as he struggled to put his first serve in play against Bolelli.
Kvitova returned to tennis in Paris after being attacked in the Czech Republic in December.
New Zealand's two other doubles players are scheduled to play first-round matches on Wednesday.
But Kvitova declared her comeback mission a success despite visibly lacking match practice as Mattek-Sands chased her across the court, switching between baseline and net play.More news: President Trump hails the fallen and their families at Arlington
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