Centre-back: Joel Matip – The signing of the 25-year-old looks like one of the bargains of the summer. A free transfer from Schalke, Cameroon international Matip has slotted straight into the centre of defence, forming an impressive partnership with Dejan Lovren. 11 Jurgen Klopp will already be making plans for the January transfer window, with his eyes firmly on the Premier League title.The Reds are currently second in the Premier League, just a point behind leaders Chelsea after 13 games.But they now face their toughest test yet, after star playmaker Philippe Coutinho was ruled out of action for up to six weeks.Klopp’s side have a wealth of talent in attack and now it is time for them to step up in the Brazilian’s absence.Not only could they be without Coutinho for a while, they will also have to play without Sadio Mane for around a month. The 24-year-old, who has slotted seamlessly into Klopp’s side since joining from Southampton, will go to the Africa Cup of Nations with Senegal in January.READ MORE: Liverpool FC news: Seven ways Jurgen Klopp’s side could line up in Philippe Coutinho’s absenceRecent reports have linked Liverpool with a move for Celtic’s highly-rated Moussa Dembele, one of Europe’s most in form forwards.Some outlets suggest Klopp is so keen on the Frenchman, he has sent scouts to watch the former Fulham man on FIVE occasions, with a view to submitting a January bid.So, if Coutinho fails to make an instant comeback Mane’s Senegal reach the latter stages of the Cup of Nations and Dembele moves to Anfield, how could Liverpool line up in the second half of the season?Click the right arrow, above, to see a possible Liverpool XI in Klopp’s preferred 4-3-3 formation…See also:Brendan Rodgers on talkSPORT in November: Celtic boss says club is not interested in selling Moussa Dembele right now amid reported interestLISTEN: Liverpool are ‘an all-round scoring team’ and can cope without Philippe Coutinho, Ian Rush tells talkSPORTLiverpool FC news: Jurgen Klopp insists Reds can deal with Philippe Coutinho’s absence through injury 11 Right-back: Nathaniel Clyne – The England defender is a key man for the Reds down the right-hand side. Despite Trent Alexander-Arnolds emergence, the former Southampton and Crystal Palace star is the first choice in his position having made it his own at Anfield in recent years. He has started all 13 of their league games this term. Forward: Divock Origi – The Belgian could get his chance to shine once Mane leaves for the Africa Cup of Nations in January. He has shown glimpses of his ability, such as a opening the scoring in the recent win over Sunderland. Will this be the making of the 21-year-old? Forward: Moussa Dembele (Celtic) – The 20-year-old has hit the ground running since moving to Parkhead on a free transfer in the summer. He has netted 17 goals in 27 appearances this term and some of Europes biggest clubs have already started circling. Liverpool hope to win the race for his signature by paying him four times his current £15,000 a week wage, according to Glasgow Live. 11 Goalkeeper: Loris Karius – click the right arrow, above, to see how Liverpool could line up in the second half of the season… – The German glovesman, who arrived in the summer from Jurgen Klopps former club Mainz, is Liverpools number one. He has showed his potential, but also moments of madness, with nervy handling when collecting crosses. 11 Left-back: James Milner – Klopp made a clear statement at the start of the campaign by opting to go with versatile Milner at left-back instead of Alberto Moreno. In doing so, Milner has performed extremely well and the German may be persuaded to keep him there for the rest of the season at least. The right footer positions himself well and gets forward at every opportunity. He is also their reliable penalty taker, with five from the spot this term. 11 11 Centre-back: Dejan Lovren – With Matip and Lovren at the centre of defence, Klopp may have solved Liverpools problems at the back. With his first choice back five of Karius, Clyne, Matip, Lovren and James Milner, the Reds have only conceded twice, according to Empire of the Kop. Lovren still has a mistake in him, but he finally looks settled on Merseyside. 11 Midfield: Jordan Henderson – The Reds captain has been one of the clubs most consistent performers this term. His passing statistics are impressive and among the best in Europe. He leads by example and has done brilliantly since taking the armband after Steven Gerrards departure in 2015. Midfield: Emre Can – The German has proved a key part of the midfield, recently playing his 100th game for the club. It is easy to forget he is still just 22 years old and he performs both his defensive and attacking duties well. 11 Midfield: Adam Lallana – It is fair to say the 28-year-old is one of the clubs most improved players this season. He has added goals to his game and is technically brilliant on the ball. With Philippe Coutinho injured, Lallanas return will be a relief to Klopp and he will be vital for the rest of the campaign. 11 11 11 Forward: Roberto Firmino – The Brazilian has been preferred to Daniel Sturridge in leading the line for the Reds this season. If Dembele came in, he may have to push further out wide, but Liverpools front three is so interchangeable throughout 90 minutes. The 25-year-old has scored six times in 14 appearances this term and he is a vital part of the Merseysiders campaign.