Neil Lennon joked that a "few Guinness" would help teenage prospect Conor Bradley bulk up a bit.
Liverpool defender Bradley boosted his already burgeoning reputation with an impressive performance against Switzerland on Wednesday night.
The 18-year-old was introduced as a 68th-minute substitute to replace Michael Smith, with the crunch World Cup qualifier delicately poised at 0-0.
Northern Ireland would go on to earn a spirited point at Windsor Park, with 18-year-old Bradley earning plenty of plaudits at the final whistle.
And former midfielder Lennon was impressed.
He told Sky Sports: "It is a big call from the manager bringing Conor into a high pressure situation.
"But Ian has obviously got great belief in him. He is obviously a talented player.
"I haven't seen much of him, to be honest. He could do with having a few Guinness and putting a few pounds on.
"But that will come with his maturity. But obviously being at Liverpool, they see him as a talent.
"He also sounded very mature in his interview.
"He is athletic, looks comfortable on the ball. So let's give him time and see how he progresses."
Bradley made an instant impression after coming on against Switzerland, sliding into a crunching tackle to get the Green and White Army on its feet.
Northern Ireland forward Jamie Ward believes the teenager has all the attributes to be a success for club and country.
He said: "Conor looked fairly solid, and the tackle gave him a buzz.
"Fans need to realise a young player needs a lift.
"He has a bright future."
