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Manchester United's Portugese midfielder Cristiano Ronaldo (L) and Spanish defender Gerard Piqu? react during a team training session at the Carrington training complex in Manchester, north-west England, on April 28, 2008. Manchester United challenge Barcelona in the second leg of a UEFA Champions League semi-final game at Old Trafford on Tuesday April 29. AFP PHOTO/ANDREW YATES (Photo credit should read ANDREW YATES/AFP/Getty Images)

Manchester United's Portugese midfielder Cristiano Ronaldo (L) and Spanish defender Gerard Piqu? react during a team training session at the Carrington training complex in Manchester, north-west England, on April 28, 2008. Manchester United challenge Barcelona in the second leg of a UEFA Champions League semi-final game at Old Trafford on Tuesday April 29. AFP PHOTO/ANDREW YATES (Photo credit should read ANDREW YATES/AFP/Getty Images)
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LONDON, ENGLAND - OCTOBER 03: Lionel Messi of Barcelona celebrates after scoring his sides fourth goal with Gerard Piqué of Barcelona during the Group B match of the UEFA Champions League between Tottenham Hotspur and FC Barcelona at Wembley Stadium on October 3, 2018 in London, United Kingdom. (Photo by TF-Images/TF-Images via Getty Images)

LONDON, ENGLAND - OCTOBER 03: Lionel Messi of Barcelona celebrates after scoring his sides fourth goal with Gerard Piqué of Barcelona during the Group B match of the UEFA Champions League between Tottenham Hotspur and FC Barcelona at Wembley Stadium on October 3, 2018 in London, United Kingdom. (Photo by TF-Images/TF-Images via Getty Images)
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