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Maxime Gonalons will be the man tasked with combating the threat of whomever Tottenham Hotspur field in the attacking midfield position.
The uncertainty of that player's identity relates to the differing options Andre Villas-Boas has to choose from right now. It may depend largely on whether Emmanuel Adebayor starts upfront, while Gareth Bale's goalscoring form in recent games has led to suggestions he should be deployed more centrally.
It is likely, though, that it will be either Lewis Holtby or Clint Dempsey who starts here. Both players differ stylistically but each will give Gonalons plenty to contend with.
Their movement especially will give Lyon's defensive midfielder pause for thought. Gonalons will not want to give them too much freedom to influence the game, but nor will he want to be dragged too far out of position. Especially when his defense will need him to help out in defending attacks from other players and positions.
Gonalons will not be easy to negotiate past. Early on at least, Gonalons will not give Dempsey and Holtby much in the way of space. He is sure to be hot on their heels in an attempt to shift the balance of play in Lyon's favor.
At 6' 2", his height ensures Dempsey will not have it all his own way in any aerial duels to win flick-ons deep into the Lyon half either.