The Brazil international, who flew overnight from Rio de Janeiro after playing in Sunday night's 2-2 draw with England, put pen to paper on his contract on Monday afternoon after passing a medical.
Another well-known billionaire art lover was in the de Pury crowd last night: Laurence Graff, the London jeweler, who has set auction records of his own.
On Thursday night, it was reported that 7-time consecutive Tour de France winner Lance Armstrong would not continue to contest the charges levied against him by the United States Anti-Doping Agency, which claimed that he doped and was among the ringleaders of systematic doping on his Tour-winning teams.
However, the Blackburn player insisted neither he nor his team-mates need any added incentive going into Wednesday night's return leg at the Stade de France.