Headache for Arsenal and Chelsea following Havertz and Jackson's injuries
Footage of Arsenal star Kai Havertz limping away from training has emerged.
The German, 25, was ruled out for the rest of the season after tearing his hamstring while at the Gunners' training camp in Dubai.
It is not yet clear whether Havertz will require surgery, but his focus will now be on trying to be ready for the start of next season.
In footage circulating online, the forward can be seen gingerly walking towards the car park, still wearing his training gear.
The injury is said to have occurred on Monday.
Havertz has scored nine goals in 21 Premier League appearances this season, while also laying on three assists.
He joins Arsenal's lengthening injury list.
Gabriel Martinelli limped out of the Gunners' Carabao Cup clash with Newcastle last week.
While Gabriel Jesus and Bukayo Saka remain long-term absentees.
Ethan Nwaneri, Raheem Sterling and Leandro Trossard are now the only recognised attacking players fit and available to boss Mikel Arteta.
Although it has been speculated that midfielder Mikel Merino could be tried as a makeshift forward.
While academy players Nathan Butler-Oyedeji, Ismeal Kabia and Khayon Edwards may enter Arteta's thinking.
Meanwhile, Enzo Maresca has been dealt a blow with Nicolas Jackson ruled out for around six weeks.
Chelsea's main striker has suffered a significant hamstring injury and is unlikely to play again before April.
Jackson was forced off early in the 2-1 win over West Ham on February 3.
He missed last weekend's FA Cup defeat at Brighton, although boss Maresca claimed beforehand that the problem was not too bad.
But a scan this week has shown it to be more serious than first thought and nine-goal Jackson now faces a spell on the sidelines.
Chelsea are due back at Brighton on Friday for a Premier League game.
After the recent FA Cup clash with the Seagulls, Maresca admitted that Jackson's absence severely hampered his team.
Fellow striker Marc Guiu is also out for some time with a muscle problem, leaving Maresca facing a crisis up front.
Christopher Nkunku was deputised last weekend. He has scored 13 times this season but only two of those have come in the Premier League due to limited appearances.
Chelsea are fourth in the table and are hopeful of securing a top-four finish to guarantee a return to the Champions League next season.
They also resume European competition in the Conference League next month, which is the club's last remaining hope of silverware this season
But they will have to do so with their main striker on the treatment table.
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