Crystal Palace are eyeing up a fourth summer signing with a bid now being prepared, despite some recent injury concerns. This summer Crystal Palace has signed three quality players who are sure to play a big role in Oliver Glasner’s team this coming season, but further additions could yet be made. Chadi Riad was the first to arrive as he joined the club in June. Following this, Daichi Kamada arrived on a free transfer from Lazio. The final addition so far was Ismaila Sarr, who joined from Marseille to replace Michael Olise. However, the Eagles are not yet done with their business. This will be…