Arsene Wenger says Arsenal are still waiting to discover the full extent of Aaron Ramsey's thigh injury.
The Wales midfielder was injured in Tuesday's FA Cup replay win at Hull and, depending on the damage, could miss key fixtures in the Premier League title run-in, plus next week's Champions League last-16 second leg in Barcelona.
"There is a small alert, we don't know how bad it is," Wenger told the club website.
Ramsey's injury also means that he is a doubt for Wales' Euro 2016 warm-up matches against Northern Ireland and Ukraine on the 24th and 28th of March.
The midfielder is expected to play a central role in Wales' Euro 2016 campaign in June, alongside the likes of Gareth Bale and Ashley Williams.
When Welsh international Aaron Ramsey tweeted in Welsh to mark his first wedding anniversary, not all of his 1.9 million followers quite grasped it.
The 24-year-old midfielder, from Caerphilly, typed 'Un flwyddyn heddiw' - meaning 'One year today' - along with a picture of him and his wife Colleen on their wedding day.
Today he thanked supporters and said he'll continue to tweet in Welsh.
But his romantic gesture was met with an onslaught of tweets from fans accusing him of leaning on the keyboard, being drunk, and even having a seizure.
Cardiff City's caretaker boss David Kerslake says he's still in the dark as to who will take over as manager following Malky Mackay's sacking last Friday. Kerslake said the club needs someone with a "big personality" as they'll have "big boots to fill".
He said the team's match against Arsenal on New Year's Day will be a "huge challenge" but they'll go to the Emirates "with no fear".
Provisional squad: Marshall, Connolly, Caulker, Hudson, Turner, Whittingham, Medel, Cornelius, Campbell, Odemwingie, Brayford, Kim, Smith, Noone, Gunnarsson, Mutch, Cowie, Maynard, Theophile-Catherine, Lewis, John.