Crystal Palace boss Roy Hodgson has told his board they need to buy this month.
Hodgson highlighted the raft of injuries his squad has suffered after their FA Cup defeat by Derby County.
He lamented, "How many injury problems from bona fide first-team players do you need before someone says that in actual fact it's very difficult for you to field a team at any point in time?
"Counting those two [Meyer and Riedewald] now, that makes 11. How many players are we going to need in our squad to put out what we would think is an equally valid 11 in games like this? I've never known a situation where so many players are injured, so many are perhaps long term injuries. We lost [Mamadou] Sakho in the Norwich game and today we lost Meyer and Riedewald who were in their turn, really, were covering for other places."