The 25-year-old picked up the injury in his club side's 15-15 draw with Ospreys in the European Champions Cup on Saturday evening, forcing him to make way midway through the match.
This clip is originally from Rugby Union Weekly, 15 January 2018.
Parts of London halt as Tom Cruise sprints over Thames River
According to director Christopher McQuarrie, Cruise was "always supposed to slam into the side of the building" during the stunt. In August, TMZ.com posted a video of Cruise in a safety harness taking a running leap from a scaffold toward a building rooftop.
It not only leaves Saracens without one of their best players again this season - having only deployed Vunipola four times this season in which two of those ended in long-term injury - but also robs England of their starting No 8 just three weeks before the Six Nations begins.
Saracens have confirmed that the England global is facing a prolonged spell on the sidelines, however, effectively ruling him out of the Six Nations, which begins in less than three weeks' time.
England scrum-half Danny Care says Billy Vunipola's latest injury will deprive the squad of "one of the best players in the world". Saracens released a bulletin mid-afternoon on Sunday but have not put a timeline of recovery until Vunipola sees a specialist later in the week.
Man United boss Mourinho responds to Sanchez speculation
But I like my squad and I like my players". "I think most probably a player like him has other big clubs interested. "He just needs to feel really happy with his knee, with his condition and that I think he can", Mourinho added.
He is due to see a specialist this week but is expected to miss England's first Six Nations game against Italy on February 4 and potentially more matches beyond.
Meanwhile, England flanker James Haskell was sent off for a unsafe tackle on Jamie Roberts in Wasps' defeat to Harlequins and a ban could render him unavailable for selection by Jones.
Moshe, baby who survived 26/11, back in Mumbai on Tuesday
Moshe and his grandparents will arrive in Mumbai on Tuesday and will be accompanied by Sandra Samuels, the nurse who rescued him. We are preparing lot of kids' food with Kosher ingredients and interesting juices and snacks for him.