Centre Back-Thiago Silva (Brazil and Paris Saint-Germain)
34-year-old PSG captain Thiago Silva has been a titanic presence in the heart of Brazil's defence, forming a seemingly unbeatable defensive partnership with club-mate Marquinhos that has blanked all oppositions in the Copa.
Impressive in the air and astute with his interceptions and tackles, the experienced campaigner will have to be at his best to keep out the world class talents of Sergio Aguero and Lionel Messi in the semi-final.
Left Back-Nicolas Tagliafico (Argetina and Ajax Amsterdam)
Just like Otamendi, Ajax left back Tagliafico has shown great resilience to come back from a poor performance in the opening game of the Copa against Colombia, to put up impressive performances since then.
He has been a potent outlet in attack as well as rock solid in defence, throwing his body in the line to deny a sureshot goalscoring opportunity to Venezuela forward Solomon Rondon in the quarter-finals. After having had a magical run into the UEFA Champions League semi-finals with Ajax, Tagliafico will be keen to cross the final 4 barrier in this tournament.
Right Back-Dani Alves (Brazil and Paris Saint-Germain)
36-year-old Dani Alves has turned back the clock at this Copa. Case in point-his lung busting run and goal against Peru in Brazil's first group game, where he completed two splendid one-twos with Arthur and Firmino to break into the opposition box and finish with aplomb.
Tite had appointed him squad captain after the injury enforced absence of Neymar and the experienced star has stuck to his task well, showing his leadership both in defence and rallying troops in attack.