England have lost Alex Mitchell for the entirety of the Nations Championship. The scrum-half sustained a hamstring injury during Northampton's 28-14 win over Gloucester on Saturday — his fourth hamstring problem of the year.

It's a genuine blow to Steve Borthwick's plans at No. 9. Per The Guardian, Jack van Poortvliet is now expected to start against Australia, while fly-half Fin Smith is also an injury concern heading into the campaign.

Four hamstring injuries in a single calendar year is an alarming pattern for a player whose game is built on tempo and sniping around the fringes. For England, the immediate question is depth; for Mitchell, it's whether the recurring issue needs a longer-term fix than another rehab cycle.