Barcelona host Liverpool on Wednesday night for the first leg of their Champions League semi final at the Nou Camp.
When the Reds arrive in Catalonia, they may see the familiar faces of a couple of former Liverpool stars. There are eight players in total who have donned the jerseys of both the Reds and la Blaugrana.
After signing the former Inter man for a fee of around £8.5m, Liverpool sold him to Barca for over £100m. However, the midfielder is yet to justify the money spent on him, as he has struggled to nail down a regular starting spot at the Catalan club in his first 18 months
Javier Mascherano
The highly-rated Argentine made the move to Liverpool following his shock transfer to West Ham in 2006. The feisty midfielder built on his reputation at Anfield as he became a first-team regular, forming a solid partnership with Xabi Alonso.
After three seasons with the Reds, Barcelona came calling and snapped up the defensive midfielder for a fee of £17m. During his time at the Nou Camp, Mascherano adopted a role in the centre of defence with Gerard Pique and went on to play over 200 times for the club
Pepe Reina
Believe it or not, Pepe Reina used to have hair. Also, he used to play for Barcelona before he made the move to Merseyside. Starting out in the Barcelona C team, the Spaniard slowly worked his way up the ranks to first choice for Barca, where he made 30 appearances in the early 2000s.
After being shipped out to Villarreal, Liverpool took a punt on the keeper - a punt which paid off, as the former Barca man went on to feature nearly 300 times for the Reds. A fan favourite during his ten years at Anfield, Reina eventually left for Bayern Munich in the summer of 2014.
Mauricio Pellegrino
Forgotten by many, the former Southampton boss had brief spells at both of these teams. The centre back was loaned to Barcelona in the late 90s from Argentine club VĂ©lez Sarsfield and made 25 appearances during this time.
Bolo Zenden
The former Middlesbrough man had a diverse career, which took him to a host of different clubs. Zenden impressed after coming through the ranks at PSV and earned himself a move to Barcelona where he would play under manager Louis van Gaal.
After spells at Chelsea and Boro, the Dutch midfielder wound up at Anfield, where he played for two seasons. Although much of his time with Liverpool was hampered by injury, Zenden featured heavily in his side's run to the Champions League final in 2007, where the Reds eventually lost to AC Milan.