Giovani dos Santos is only 18 years old but Celtic must not underestimate Barcelona's prodigiously talented teenager.
He can play on either wing, down the middle or behind the main striker, and has made 18 appearances for Barca this season, with one Champions League goal.
South American football reporter Tim Vickery told BBC Sport: "He is the son of Brazil international Zizinho, but he plays for Mexico - and masterminded the 3-0 win over Brazil in the final of the 2005 World Under-17 Cup.
"He is a slight figure with a terrific burst of acceleration and he has a superb left foot."
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