Celtic have let some big players go in years gone by, including Virgil van Dijk, who is now recognised as one of the best in the world. Just how good a team could Celtic have if they'd kept all their best players?<br /><br />LOVE FOOTBALL? HIT THE SUBSCRIBE BUTTON FOR THE LATEST TRANSFER RUMOURS AND FAN OPINION<br /><br />- LATEST FOOTBALL NEWS AND GOSSIP: http://www.hitc.com/en-gb/sport/football/<br /><br />- FOLLOW US ON FACEBOOK: https://www.facebook.com/HITCsport<br /><br />- FOLLOW US ON TWITTER: https://twitter.com/HITCsport
