I hope Darwin Nunez hit the ground running when the league starts just like when Luiz Daiz came in January transfer window, though it will a difficult task to fill the impact of Mane after his departure from Liverpool, however I believe trio attacking force of Salah, Nunez and Luiz Daiz optionally with Firminho will be very strong and sharp, Nunez Nunez is a centre forward who can play also at the flank just like Mane, there is going to be a lot of expectations from him by Liverpool fans thus more pressure is on him to deliver, I hope Liverpool won't regret the exit of Mane to Bayern Munich.
Nunez is the right choice to replace the role of Mane who left for Bayern Munich. I don't know exactly if he will be successful in the Premier League but he probably knows what he has to do at Liverpool and Luis Suarez once said Nunez would do well there. Nunez is not the first Uruguayan at Liverpool, so I think he can probably be expected to play well and be an important player that Klopp has in this new season.
Some will doubt Nunez at Liverpool but maybe that's an overreaction from those who disagree. One could say Nunez's signing by Liverpool was a huge mistake, but he has proven his qualities with Benfica over several seasons. In my opinion, it has nothing to bad with signing Nunez because he looks good to be a palyers in Liverpool's front attack.