LONDON, United KIngdom (AFP) — Jannik Sinner survived a major scare and a bloodied foot to open his Wimbledon title defense with a five-set victory over Miomir Kecmanovic, while Novak Djokovic had to dig deep to beat China’s Wu Yibing.

Sinner was pushed to the brink of becoming only the third male defending champion to lose in the Wimbledon first round before battling back to win 4-6, 6-3, 6-7 (6/8), 6-2, 6-3 on Monday.

Trailing by two sets to one, the Italian world No. 1 dug deep to win his first five-set match in his last six attempts.

Sinner’s gutsy victory in three hours and 28 minutes was all the more commendable after he injured his right foot in an awkward fall that left his shoe covered in blood.

He let out a shriek of pain and was motionless for several moments before gingerly resuming play.

With two-time Wimbledon champion Carlos Alcaraz still sidelined by a wrist injury sustained in Barcelona in April, Sinner is the clear favorite to become the 10th man in the Open era to retain the trophy.

He is bidding for his fifth Grand Slam title and his first since his maiden victory at the All England Club last year.

But the 24-year-old hasn’t reached a Grand Slam final this year and crashed out of the French Open in the second round, blowing a two-set lead against Juan Manuel Cerundolo as he wilted in the stifling Paris heat.

Ahead of Wednesday’s second-round clash with Portugal’s Nuno Borges, the Italian insisted he would not be affected by his latest fitness concern.

“I’m good. It just seems much worse than it is. I’m actually very surprised that they let me keep playing because my all white outfit turned a little red! It is just a nail,” he said.

In Alcaraz’s absence, Djokovic, a seven-time Wimbledon champion, is expected to be one of Sinner’s main rivals.

The 39-year-old Serbian is chasing an all-time record of 25 Grand Slam singles titles among men and women.

Djokovic would become the oldest man to win a Grand Slam in the Open era if he lifts the trophy on 12 July.

Reaching those historic targets will require a significant improvement from Djokovic, who labored for over three hours in a 6-4, 5-7, 6-4, 6-4 win over Chinese world No. 102 Wu in front of David Beckham and rapper Bad Bunny.

“It was very challenging for me today. I’m feeling happy but not the freshest I guess. It didn’t feel like the first round to be honest,” said Djokovic, who plays Stefanos Tsitsipas in the second round.

Women’s world No. 1 Aryna Sabalenka needed only 65 minutes to rout Serbian qualifier Teodora Kostovic 6-2, 6-3.

Sabalenka is a four-time Grand Slam winner but the Belarusian has never reached the Wimbledon final.

In the second round, the 28-year-old meets American McCartney Kessler.

“Super, super excited to be back. It’s a special place to play on this beautiful court,” Sabalenka said.

French Open finalist Maja Chwalinska crashed to a shock 2-6, 7-5, 6-2 defeat against Thailand’s Mananchaya Sawangkaew after suffering an injury on match point.

Just weeks after her fairytale run as a qualifier at Roland Garros, Polish 20th seed Chwalinska was unable to recapture her clay-court magic.

Japan’s Naomi Osaka made a spectacular entrance as she arrived on court in a kimono-inspired dress prior to her straight sets win against France’s Elsa Jacquemot.

Osaka has become known for wearing flamboyant outfits before starting her matches.

The four-time Grand Slam champion’s Wimbledon costume — a ceremonial dress decorated with embroidered cranes and cherry blossom — was another eye-catching choice.

Elsewhere on opening day, Norwegian 11th seed Casper Ruud — a three-time Grand Slam finalist — slumped to a 6-4, 6-2, 7-6 (9/7) defeat against Poland’s Hubert Hurkacz.

Canadian third seed Felix Auger-Aliassime beat Alexander Shevchenko in convincing style.