The club's new trio faces its first game next weekend when they travel to Champions League participant RB Leipzig.
Monday's first game saw Fulham outclassed at home by Aston Villa. The side that won promotion to the top-flight two seasons ago, outplayed the team that did the same last season with goals from Jack Grealish after four minutes, Conor Hourihane 11 minutes later and Tyrone Mings three minutes after the break.
The 39-year-old tennis great, who is seeking a record-tie 24th Grand Slam title, skipped all the tune-up tournaments for the clay majors and practised at the Mouratoglou Academy, but acknowledged she was "not one hundred percent" as the French Open started.
Some fans and pundits fear Flick could soon be fed up with his side's strategy to avoid costly transfers and follow what many call a healthy spending policy.
However, that goal only served to pique Liverpool and Sadio Mane drew them level with a simple volleyed finish after Leno did well to parry a shot from Mohamed Salah on the break.
Elsewhere, last season's fourth-placed side Lazio enjoyed a 2-0 away win over Cagliari with goals from Manuel Lazzari and Ciro Immobile.
However, the wheels came off on Sunday as they crashed to a 6-1 defeat away to Atletico Madrid, who tore Granada's usually solid defense apart time after time.
Striker Issa Alekasir's header in the 88th minute found the back of net and sent the Reds to the competition's next round.
"I am going to be extra careful hitting a tennis ball around the court. That's something that is obviously staying in my mind after what happened in New York," Djokovic said in a press conference before the French Open.
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.
Bayern coach Hansi Flick added more quality with Leon Goretzka and Robert Lewandowski coming on the pitch but the goals were scored at the other end of the pitch as Ihlas Bebou set up for Kramaric, who kept his nerves to overcome Neuer from inside the box in the 77th minute.