Schalke has worn out 23 coaches in the last 20 years.
"We are exhausted," the 32-year-old Pole said after the Bavarian lost 4-1 in Hoffenheim.
Atletico Madrid were unable to repeat the performance that gave them a 6-1 win over Granada at the weekend, as they were held 0-0 away to recently promoted Huesca.
Coppa Italia holder Napoli trashed Genoa 6-0, with Chucky Lozano scoring a brace, but captain Lorenzo Insigne limped off with injury.
PARIS, Sept. 27 (Xinhua) -- Italian teenager Jannick Sinner made his Roland-Garros debut with an impressive 7-5, 6-0, 6-3 win over 11th seed David Goffin on Sunday, while women's top seed Simona Halep celebrated her 29th birthday with a straight-set victory over Spaniard Sara Sorribes Tormo.
"This also reflects the ever-increasing international appeal of table tennis, which is extremely pleasing to see as we continue to work hard to make the sport more global in the future," he added.
If Villarreal coach Unai Emery was unhappy at the space his side left Barca in the opening goal, he will have been furious as Fati doubled his tally just four minutes later.
Real Madrid confirmed with a communique on their official website on Wednesday that the Belgian international has suffered "a muscle injury in his right leg."
Bayern responded well but still lacked in penetration to overcome Hoffenheim's defense. To make things worse, Hoffenheim doubled their advantage eight minutes later as Munas Dabbur capitalized on a misplaced clearance from Benjamin Pavard to beat goalkeeper Manuel Neuer into the far post corner.
Things went from bad to worse as Neuer felled Bebou inside the box to concede a penalty in the closing period. Kramaric stepped up to sew up the 4-1 victory on home soil.
With the victory over Ymer, Djokovic improved his record this season to a stellar 32-1. The only defeat came in a disqualification earlier this month at the US Open, where he hit a ball in frustration which struck the line judge on the neck.