​​Crystal Palace made a total of four summer signings, but Paul Merson has claimed that the biggest thing in the transfer window was keeping Wilfried Zaha. 

That's the view of the former ​Arsenal and ​Aston Villa midfielder, who has given his opinion on the business done by each Premier League club in the summer transfer window.

Crystal Palace v Toulouse - Pre-Season Friendly

Palace have made four summer signings, with the deadline day arrival of Jordan Ayew on a season-long loan from ​Swansea City, adding to the signings of Spanish goalkeeper Vicente Guaita, and midfielders Cheikhou Kouyate from ​West Ham and Max Meyer on a free transfer from ​Bundesliga side ​Schalke 04.

Numerous players left the club this summer, with Yohan Cabaye and Bakary Sako leaving at the end of their contracts, while Damien Delaney, Diego Cavalieri and Chung-yong Lee were all released.

Crystal Palace v Toulouse - Pre-Season Friendly

As part of a his analysis for the Sky Sports website, the pundit gave Palace a B grade for their transfer activity, adding that he felt the summer business has been good for the Eagles.

"I thought Cheikhou Kouyate was a very good signing, but the one for them is Wilfried Zaha staying," he said.

"For me, they never won a football match when he was injured so he's a must for them. By keeping him, they stay in the ​Premier League again and that's what it's all about. But I do like Kouyate. I thought for £9m, that was cheap as chips."

Crystal Palace v Toulouse - Pre-Season Friendly

Zaha's performances last season showed he is still a world class talent and there had been plenty of rumours linking the 25-year-old with a move away from Selhurst Park. By keeping hold of a talisman such as Zaha, Palace fans will definitely be more optimistic about the season ahead.