Roberto Firmino became one of Liverpool's most important players at the moment. His performance continues to increase. Its unique role also makes no one can shift the Firmino from the main team.
Actually, the Firmino contract is still running until 2020. But, Liverpool certainly does not want to lose more stars. These are reasons Liverpool have to extend the player's contract.
Klopp had said that Firmino is a very important player for him. He is considered the most consistent figure than Mohamed Salah and Sadio Mane in the attacker position. Firmino is a mature figure because of a Klopp. So the relationship of both cannot be denied again.
Firmino is Liverpool's leading player. But, the style of play is very unique. Many consider Firmino to be false nine, though in fact, he is more than that. The ability of tackle, pressing, and interception is very unusual for the front players. This is considered to help the team significantly. And no one can replace him in the meantime.
Firmino could be one of the stars in the World Cup. He is one of the players who is confirmed to be in the Brazil squad there after being confirmed by Tite. Indeed there is Neymar in this team, but, Firmino could be an underrated figure who brings Brazil to the highest point and hence the selling price he will be more expensive.
Without a Firmino, Mane and Salah probably would not be as sharp as it is now. His ability to open space, backed away, making both his colleagues can perform very optimally. If Liverpool had another striker who did have the task of scoring only goals, Mane and Salah cannot seem as good as now.