Djokovic has encountered few problems this week at Roland Garros and hopes his fledgling partnership with American great Andre Agassi will inject a much-needed boost.
- Fifth seed Milos Raonic progressed to the last 16 after Guillermo Garcia-Lopez retired hurt on Court 2.
"I expected a hard game with a lot of baseline exchanges so congratulations for a big battle to Diego because he played really well".
Rafael Nadal, nine-time victor at Roland Garros, geared up pretty well in his quest for the 10th trophy as he swept Nikoloz Basilashvili 6-0, 6-1, 6-0 in men's singles third round here on Friday.
David Goffin suffered an unfortunate exit after a trip at the back of the court forced him into quitting the match, with Horacio Zeballos the beneficiary.
As Schwartzman became less proficient and complained about issues in his right hip area - a trainer came out and gave him a massage during a changeover late in the final set - Djokovic became more assertive and more accurate.
"For me, I do this on my own time and my own dime", said Agassi. "So a lot of things that I achieved are because he was there since I was three-years-old, helping", Nadal said.
The world number 41 is through to the last 32 of a major for the first time but was comprehensively swept aside when the pair met at the 2014 US Open, their only previous meeting.
Johnson will next face sixth-seeded Dominic Thiem, who moved into the third round with a 7-5, 6-1, 6-3 win over Simone Bolelli of Italy. Zeballos carried Goffin's bag.
After a scare in Round 2 against Anett Kontaveit, women's champion Garbine Muguruza will also take to the clay again. He has dropped just 14 games across the six sets, holding serve easily for the most part and breaking when he needed to.
It was a solid performance from the world number five and she will take on either 24-year-old American Shelby Rogers or rising French star Kristina Mladenovic in the fourth round. He won the point to get back to deuce but slid after he hit it, catching his foot on the tarp at the back of the court.
The 2017 French Open is shaking down to be quite interesting thus far, and on Friday the third round will get underway.
Kazakh 27th seed Putintseva enjoyed her best Grand Slam performance in Paris past year when she made the quarter-finals.
Williams, the 2002 runner-up who turns 37 next month, will play Belgium's Elise Mertens in the third round.
How Herrera became unlikely leader of Mourinho's United
Phil Jones admits that Manchester United's season hinges on beating Ajax in the Europa League final in Stockholm on Wednesday. We've had a few managers, different players coming and going, but I feel really happy to be at this club.