Arsenal had a blockbuster end to the transfer window as they signed Raheem Sterling from Chelsea on loan late in the day. The Gunners made a real splash to end the window, and it’s fair to say that this could be a brilliant signing. Don’t just take our word for it though, speaking on his YouTube channel, Rio Ferdinand has also hailed Arsenal’s business here, claiming that this is a ridiculous bit of work from the Gunners to get such a deal done so late. READ MORE: Arsenal staff are shocked by one aspect of the deal to sign Raheem Sterling from ChelseaRio Ferdinand reacts to Raheem Sterling dea…