Exeter Chiefs and England winger Nowell tore his hamstring during the November internationals and faces a race to be fit for the Six Nations.
Exeter Chiefs have announced the signing of Scotland international Stuart Hogg on a two-year deal.
Former England and Exeter Chiefs forward Thomas Waldrom has retired from rugby.
Brian O'Driscoll has tipped Exeter Chiefs as favourites to win the Champions Cup title this season, alongside recent winners Leinster and Saracens.
England backrower Sam Simmonds will be out for the next six to nine months after tearing his ACL, casting doubt over his chances of playing at next year's Rugby World Cup.
Saracens and Exeter Chiefs' blistering start to the Premiership season shows they are ahead of the rest of the division, according to Worcester's Alan Solomons.
From best opposition player to best dressing-room DJ, Premiership stars such as Danny Care and Jack Nowell give us the lowdown ahead of the new season.
Leinster and Saracens fans were smiling this weekend as domestic honours were secured, while Castres set up a mouthwatering Top 14 final in Paris next weekend.
It has been a season of highs and lows for Saracens, but they have finished it off in style.
On a day of inevitable remarkable sporting drama and silverware, Saracens put their flag in the ground with a performance of immense resourcefulness to beat Exeter Chiefs 27-10 and take the 2017-18 Aviva Premiership title.
Exeter and Saracens bring down the curtain on another thrilling Aviva Premiership season, and a couple of storied careers, when they meet at Twickenham on Sunday.
James Harrington runs the rule over the Aviva Premiership and PRO14 finals, plus the Top 14 semifinals, to predict which player will shine brightest, who will have an afternoon to forget and a whole lot more.
Exeter boss Rob Baxter has backed young fly-half Joe Simmonds to relish his key role in Saturday's Aviva Premiership final against Saracens.
Billy Vunipola is expected to start Saracens' Aviva Premiership final against Exeter at Twickenham on Saturday despite coming off at halftime in Saracens' semifinal victory over Wasps.
Plenty was sorted out over an enthralling few days but who shone, who had a weekend to forget and what will fans be talking about ahead of a busy period of domestic action?
Rob Baxter praised a "glued together" performance after his Exeter team saw off Newcastle to reach their third successive Aviva Premiership final.
Tries from Nic White, Olly Woodburn and Don Armand helped Exeter set up a Twickenham date with Saracens with a 36-5 defeat of Newcastle.
The 2017-18 Aviva Premiership semifinals take place with Newcastle looking to emulate champions Exeter by beating the Chiefs and punching their ticket to Twickenham.
Following eight months of intense competition four teams are left battling for silverware in the Aviva Premiership and PRO14, while Castres, Lyon, Toulon and Toulouse target a place in the Top 14 semifinals.
Exeter completed the regular Aviva Premiership season with an emphatic 41-17 victory at Twickenham Stoop that consigned Harlequins to a chastening 10th-placed finish.
Ruan Ackermann has been rewarded for a fine first season in England with a place on the shortlist for Premiership Rugby's Discovery of the Year award.
Exeter ensured they would finish top of the Aviva Premiership at the end of the regular season with a hard-fought 34-19 win over Sale before a sell-out crowd at Sandy Park.
Sam Simmonds' hat-trick sealed Exeter Chiefs a home Aviva Premiership semi-final as the league leaders thumped London Irish 45-5 to push the Exiles ever closer to relegation.
Global insurance brokers Gallagher have been confirmed as new title sponsors of English rugby union's Premiership.
Exeter extended their lead at the top of the Aviva Premiership table to eight points with a convincing 46-10 win over Gloucester at Sandy Park.
- EXET5thTRIES SCORED 1st Leinster : 13 Tries ScoredLEINS1st1113
- EXET8thPOINTS DIFFERENCE 1st Leinster : 55 Points DifferenceLEINS1st055