Callum Wilson is out for at least six weeks and Sven Botman could be out longer with an injury at Newcastle.

Callum Wilson (left) suffered a hamstring injury during Newcastle's 2-0 defeat to Borussia Dortmund. Photo: Shutterstock/Friedemann Vogel

Newcastle United's injury crisis shows no sign of abating after it emerged Callum Wilson will be out for at least six weeks with a hamstring injury, while centre-back Sven Botman could be out for even longer -for problems with the knee.

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Telegraph Sport can reveal that only one injured player, Sweden international Alexander Isak, is expected to return to action after the international break, which is unlikely to ease coach Eddie Howe's worries ahead of a grueling fixture schedule.

Worse still, the midfielder Sean Longstaff is also battling a swollen ankle and is considered doubtful for Newcastle's next match, home to Chelsea on November 25. blow.

Newcastle made the signing of a central midfielder to replace the Italy international their top priority in January and continue to have a keen interest in Manchester City's Kalvin Phillips. But this will not help Howe until the end of the year.

And this is a grim picture painted by sources at the club, given Wilson's hamstring injury suffered in the last match against Borussia Dortmund. week and is expected to be sidelined until the end of December.

Botman could face a lengthy layoff due to injury

There are also growing concerns over Botman, who has not featured since the 8-0 thrashing of Sheffield United at the end of September. The Dutchman scored his first goal for the club in the win, but was sent off shortly afterwards and there are fears he will need surgery. Newcastle's medical staff are trying to resolve the knee problem with rest and non-invasive repair work, but there is no sign of an imminent return and the 23-year-old is still not training with the group.

It was hoped that surgery — and a long rehabilitation period — can be avoided, but the longer he remains out of the game, the less likely it is.

If surgery is required, the former Lille defender could be expected to be out until February at the earliest. Newcastle are still hoping to avoid this scenario, but there has been no improvement in the last few weeks and asking him to return is a risk as he could easily make the problem worse and be forced to have surgery anyway.

One The good news is that the muscle problem suffered by Miguel Almiron during last weekend's defeat to Bournemouth is not serious and he could return in time to face Chelsea after the international break.

Striker Harvey Barnes, a £45m summer signing from Leicester City, has also made good progress following a foot injury against Sheffield United but is not expected to feature again the team is at least another month away.

< p>Elliot Anderson could also return before the end of the year, but Dan Byrne, Jacob Murphy and Matt Targett won't return until mid-January.