Barcelona will be required to pay a €100million (£89million) surcharge if they sign another Liverpool player before 2020, as part of Philippe Coutinho’s move to the Camp Nou earlier this year.

Coutinho joined Barcelona in January in a £142million transfer following a long and determined pursuit by the Catalonian club.

Liverpool were reluctant to let Coutinho leave, rejecting the player’s transfer request in August 2017, though eventually relented when offered the third-highest transfer fee in football history.

Liverpool vs Fulham player ratings Show all 22 1 /22 Liverpool vs Fulham player ratings Liverpool vs Fulham player ratings <b>Liverpool:</b> Alisson - 6 out of 10 Made a ropey start to the game but was switched on to play the ball early and give Liverpool a break that led to the opening goal. Action Images via Reuters Liverpool vs Fulham player ratings Trent Alexander-Arnold - 7 out of 10 Looked threatening on the overlap and delivering balls into the box, he had a good tussle with Sessegnon and sent the ball down the wing to Salah to give Liverpool the first goal. PA Liverpool vs Fulham player ratings Joe Gomez - 6 out of 10 Looked a little slack at the back, letting Sessegnon get past him to have a chance on goal and got booked for a challenge on Mitrovic. Action Images via Reuters Liverpool vs Fulham player ratings Virgil van Dijk - 6 out of 10 Played clean up for Liverpool as they made some mistakes in the first half but was solid in clearing the ball. Getty Images Liverpool vs Fulham player ratings Nathan Robertson - 8 out of 10 Played some good balls into the box, none better than his delivery to Shaqiri that set up Liverpool’s second goal. Getty Images Liverpool vs Fulham player ratings Georginio Wijnaldum - 6 out of 10 Had a solid game with Liverpool in dominance, he played the ball forward and kept Liverpool advancing. Liverpool FC via Getty Images Liverpool vs Fulham player ratings Fabinho - 6 out of 10 Had a good game especially considering his start at Anfield. He won back the ball in mid-field and played some great balls over the top into the box. Action Images via Reuters Liverpool vs Fulham player ratings Xherdan Shaqiri - 9 out of 10 Was Liverpool’s most active player, running into space, creating chances and playing in passes with gusto, his goal in the second half was well deserved. EPA Liverpool vs Fulham player ratings Sadio Mane - 7 out of 10 Took a few shots but was denied by Rico, his pace was too good for Fulham’s defence as well and he caused them serious problems. Action Images via Reuters Liverpool vs Fulham player ratings Mohamed Salah - 8 out of 10 Scored the opener and should have had more. It’s a testament to how good he is that this performance was quite contained. REUTERS Liverpool vs Fulham player ratings Roberto Firmino - 6 out of 10 Had a quiet first half but linked well with Salah in a one-two combo to send Salah clear on goal. Getty Images Liverpool vs Fulham player ratings <b>Fulham:</b> Sergio Rico - 8 out of 10 Made two good saves to deny Salah in the first half and another two cracking saves in the second to stop Liverpool running away with the match. EPA Liverpool vs Fulham player ratings Cyrus Christie - 6 out of 10 Held his own against Mane, keeping up with him and making strong challenges to win the ball. EPA Liverpool vs Fulham player ratings Denis Odoi - 6 out of 10 Employed the no nonsense method of defending, clearing the ball and cutting out the crosses but tried to play Salah offside instead of forcing him out wide which led to the opener. REUTERS Liverpool vs Fulham player ratings Alfie Mawson - 7 out of 10 Held his own against Salah as the ball came into the box from the wings and made some important interceptions to close down Liverpool’s attacks. He kept his team going through the second half and showed some spirit despite being two goals down. PA Liverpool vs Fulham player ratings Maxime Le Marchand - 6 out of 10 Made some good challenges in defence and was quick to send the ball forward. Action Images via Reuters Liverpool vs Fulham player ratings Andre-Frank Zambo Anguissa - 5 out of 10 Had a shocking second half, gave the ball away cheaply and was caught in possession on multiple occasions. Action Images via Reuters Liverpool vs Fulham player ratings Calum Chambers - 6 out of 10 Tracked back well and made some good clearances form defence. Also offered Fulham some options going forward. REUTERS Liverpool vs Fulham player ratings Andre Schurrle - 5 out of 10 Found space out on the right and forced Alisson into a diving save with a decent shot but that was the only impact he had on the game. Action Images via Reuters Liverpool vs Fulham player ratings Tom Cairney - 7 out of 10 A much needed presence up top for Fulham. He held the ball up well and was always challenging to win the ball back. Action Images via Reuters Liverpool vs Fulham player ratings Ryan Sessegnon - 6 out of 10 Fulham’s most dangerous threat. He had a great chance in the first half but sent it wide. REUTERS Liverpool vs Fulham player ratings Alensandar Mitrovic - 7 out of 10 Helped the ball on to send Sessegnon free on goal and scored a goal that was disallowed after he strayed offside, he was a lone presence up front but held the ball up well and won a few free kicks for Fulham. REUTERS

Negotiations between the two clubs also included a clause, brokered by Liverpool sporting director Michael Edwards, which effectively prices Barcelona out of taking more players from Anfield in the medium term.

The clause, which adds a €100million premium on any prospective Liverpool player joining Barcelona, came into effect in January and runs until the end of the 2019-20 season.

Coutinho was the third player to swap Anfield for the Nou Camp in the space of eight years, following the high-profile departures of Javier Mascherano in 2010 and Luis Suarez in 2014.