Merson won an impressive two league titles, one FA Cup, one League Cup and a European Cup Winners' Cup during his time with the Gunners, alongside 21 caps for England. But his career was plagued with both gambling and alcohol addictions that lasted long into his non-playing days. Merson is now clean but feels that gambling is more of an issue in football than alcohol, as he added: "It [gambling] is big in football, it's a hidden addiction because it's a hard one for managers to get hold of. It's easy to hide. If a player comes in who's been out drinking 'til four o'clock in the morning, you know.
"But if they drop 200 grand at a casino or betting, you never know until it's too late. Talking to Tony [Adams] about Sporting Chance [rehabilitation clinic], it's gone from 70-30 in terms of drinking over gambling to the other way round - it's 70% gambling and 30% drinking. That tells you it's a massive thing. With gambling, clubs think, 'well, it's not harming them really - it's not going to affect their game'. But it will affect their game more than drink. I used to think I was a bad person who was trying to be a good person but I wasn't, I was an ill person who needed to get well."