Fletcher, who has not played for his country for about two years, was selected by Gordon Strachan for the March 5 trip to Warsaw and could quite possibly step into the captaincy role currently held by the unassuming Brown.
"I'm glad to see Darren back. He's a class player at Man United and when fit was playing week in, week out under Sir Alex Ferguson," he told the Daily Record.
"That shows what a quality performer he is. He's up there with some of the best I've ever played with.
"I'm not too sure what will happen with the captaincy. I'm sure the gaffer will let us know."
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