The former Celtic winger Joe Miller believes Tony Watt made the correct decision by opting to leave the SPFL Premiership champions.

The 20-year-old striker agreed to join Belgian outfit Standard Liege on a five-year contract with Celtic receiving a fee of £1.2m.

Miller was an interested onlooker as Watt was catapulted into the spotlight following his winning goal against Barcelona in the Champions League group stages in 2012.

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The youngster failed to take the next step, however, and spent the duration of the last campaign in Belgium with Lierse.

Miller, who won a Premier title and two Scottish Cups at Celtic, said: "Having watched how it has gone for Tony since that night against Barcelona, I felt he had to leave because it just wasn't going to happen for him at Celtic. He was always a fringe player.

"Even when they played Barcelona that night, he was on the bench. Tony will forever be remembered for that. But, in reality, he didn't do much else."