The Swiss 18-time Major champion wants to shed the 'practice world champion' tag and will be seen playing in Stuttgart this week.
Nadal beats Stan Wawrinka in straight sets to win the men's singles title at Roland Garros for the 10th time.
Simona Halep produced an incredible escape act to reach the French Open semi-finals on Wednesday.
Swiss Bacsinszky reached the women's semis for the second time at Roland Garros, to meet Latvian teen Ostapenko.
All singles rubbers will be played on a best-of-three set basis instead of the traditional best-of-five.
Nine-time Roland Garros champion stays on course for 10th title, women's defending champion shown the door.
Nine-time champion Rafael Nadal lost just one game in a ruthless display to reach the French Open last 16 on Thursday, but title-holder Novak Djokovic needed five sets to survive.
Rafael Nadal admitted a French tennis player's attempt to kiss a television reporter against her will during a live broadcast made for "uncomfortable" viewing.
Defending champion Djokovic battered Portugal's Joao Sousa 6-1, 6-4, 6-3 to make it four wins in as many meetings with the world number 59.
Nadal began his pursuit of a record 10th French Open title with an easy win over Benoit Paire as Djokovic brushed aside Marcel Granollers to reach the second round.
The 30-year-old Spaniard is the overwhelming favourite to win the title at Roland Garros.
Andy Murray starts against Russia's Andrey Kuznetsov, Novak Djokovic tackles Spanish clay courter Marcel Granollers while Rafael Nadal meets combustible Frenchman Benoit Paire.
The Spanish star withdrew from the 2016 tournament with a left wrist injury on the eve of his third round match, going on to miss Wimbledon before returning for the Rio Olympics.
Zverev entered the top 10 after his victory against Novak Djokovic 6-4, 6-3, in the Rome Masters final on Sunday.
Novak Djokovic will now face Dominic Thiem after the Austrian starlet sent seven-time champion Rafael Nadal of Spain crashing out in the quarters.
Nadal, a former seven-time champion in the Italian capital, had dominated Thiem to win the Madrid Masters final last week.
The Spaniard is now 15-0 on his favoured surface this year having also picked up his 10th titles in Monte Carlo and Barcelona in recent weeks.
Rafael Nadal snapped a seven-match losing streak against Novak Djokovic in commanding fashion as he romped into the final of the Madrid Masters 6-2, 6-4 on Saturday