The 26-year-old, who still has three years remaining on his contract, is considering his future at Paris Saint-Germain after falling behind Angel Di Maria in the pecking order.
Liverpool sent its chief scout to evaluate Paris Saint-Germain midfielder Javier Pastore, according to France Football.
Kevin Hunt reportedly watched the 26-year-old in action during the 4-0 win over Rennes on Friday night, who played the full 90 minutes and notched an assist.
Goal reported last week that Pastore is considering his future at Parc des Princes following a injury-ravaged season and falling behind Angel Di Maria in the first-team pecking order.