Matip was sidelined for the Reds’ trip to take on Bournemouth on December 4, with his side eventually losing 4-3 despite leading 3-1 with less than 30 minutes to play.
The Cameroonian was clearly missed within Jurgen Klopp‘s defence, with Liverpool’s capitulation proof of his importance.
Klopp will be buoyed, therefore, by Matip’s return to full training, with the summer signing joining his team-mates on the field during their mid-season trip to Barcelona.
The Reds flew to Catalonia shortly after their defeat at Dean Court, though their time away from Merseyside was planned in advance.
Matip is now likely to start at Anfield on Sunday afternoon, as Klopp’s side look to rewrite their form with victory over Slavan Bilic’s struggling Hammers.
Liverpool are yet to suffer defeat when Matip has played this season, with the No. 32’s strength and defensive nous proving crucial to their efforts at the back.
He has slotted in seamlessly alongside Lovren, providing a composed presence at the heart of defence, and a progressive option as they look to push forward as a cohesive unit.
Tellingly, without Matip in the Premier League this season, Klopp’s side have conceded nine goals in three games, while they have also conceded just nine goals in the 11 games he has played.
He has also contributed heavily to three of Liverpool’s four clean sheets in all competitions this season.
Liverpool will return to Merseyside on Wednesday, with preparations then continuing at Melwood.