​Liverpool have been knocked back in their bid to sign Gremio striker Luan with the Brazilian side dismissing the Reds' interest in the striker in favour of doing business with Barcelona.

The Catalan giants are known to be scouring the transfer market for a back-up striker to supplement the free-scoring trio of Lionel Messi, Neymar and Luis Suarez and their search has taken them to Brazil and to Luan.

The 23-year-old is set to play a part in the Olympic Games for his country and Gremio have set an asking price of 22m, according to Spanish publication ​Sport.

They're willing to sell Luan to Luis Enrique's side, but have reportedly rejected Liverpool's approach for the forward, with Jurgen Klopp potentially looking for a replacement for both Christian Benteke and Mario Balotelli who have been linked with moves away from Anfield.

Gremio v San Lorenzo - Copa Bridgestone Libertadores 2016

Luan is yet to receive a senior cap for Brazil, but was included in their provisional Copa America team before being axed from the final squad.

Barcelona sporting director Robert Fernandez has reportedly held talks with both Gremio and representatives of the player, with Luan also speaking to fellow countryman Neymar about a move to Camp Nou.

The Blaugrana are expected to keep their options open before pursuing a move for the versatile forward who has scored five goals in 14 appearances for Gremio in Brazil's Serie A.

Meanwhile, Liverpool are set to enter the new Premier League season with Daniel Sturridge, Divock Origi, Danny Ings and Roberto Firmino as their first-choice striking options, with the futures of Benteke and Balotelli yet to be resolved.