Thiago Silva's return will bolster Paris St Germain's solidity as they look to put a period of inconsistency behind them in Wednesday's Champions League last 16 second leg at home to Valencia.
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PSG, who won the first leg 2-1 at the Mestalla, have since beaten rivals Olympique Marseille 2-0 in Ligue 1 and in the French Cup but those two wins were sandwiched between a 3-2 defeat at Sochaux and a 1-0 loss at 10-man Stade Reims.
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They will miss the suspended Zlatan Ibrahimovic and Marco Verratti but the Brazil centre half's comeback from injury is a huge boost.
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"I will bring a bit of tranquillity," Thiago Silva, whose composure at the heart of the PSG defence has been impressive since he joined from AC Milan during the close season, told a news conference on Tuesday.
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The 28-year-old has not played since January 11 when he picked up a thigh injury in a goalless Ligue 1 draw against AC Ajaccio.
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"He is a great player, I am happy that he is back in perfect physical shape," coach Carlo Ancelotti added.
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"I expect him to use his individual qualities to help improve our game as a team.
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"When PSG play as a team, like they did during the first leg, they're dangerous." Thiago Silva has little doubt that PSG will be more focused than they sometimes have been in the French League.
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"The Champions League makes you be 100 percent focused, which is not always the case with Ligue 1," he explained.
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David Beckham "could play", Ancelotti said.
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The former England captain, who joined on January 31 as a free agent on a five-month deal, has been included in the squad and could replace fellow midfielder Verratti just like he did when PSG took on Marseille in the French Cup last Wednesday.