[1][2] In the UEFA Champions League, Liverpool reached the final for the second consecutive year after producing an improbable 4–0 comeback win over Barcelona to overturn their 3–0 first leg advantage.
Tranmere fired back with goals from Jonny Smith scoring a rebound after a hard free kick Loris Karius could not hold on to, then Amadou Soukouna tacked on a late second, but Liverpool held on and won 2–3.
[14] On 19 July, Liverpool confirmed their fourth signing of the summer in Alisson for a £56 million transfer fee, making him the most expensive goalkeeper in history at the time of purchase.
[18] Liverpool then participated in the International Champions Cup in the United States, first heading to Charlotte's Bank of America Stadium on 22 July to play Borussia Dortmund.
Leroy Sané opened the scoring in the 57th minute, but it was substitutes Sadio Mané and Mohamed Salah, coming back from their time off following the 2018 FIFA World Cup, to give Liverpool the 1–2 victory over the Premier League rivals.
In the second half, goals from Sturridge, Ojo (from the penalty spot) and newest signing Xherdan Shaqiri's bicycle kick on his debut gave Liverpool the 1–4 win.
[36] During the international break, the Reds would suffer several injury problems to key players, including Salah, Mané, Van Dijk and Keïta, though only the latter would be out for an extended period.
The Reds went ahead following Salah's strike in first half, as the game also marked the introduction of Fabinho, who made his Premier League debut after coming as a substitute in the 69th minute.
In the last few minutes of game time, captain Jordan Henderson was sent off following a foul on Étienne Capoue, which resulted in his second yellow card and dismissal.
In a very tight and close game, several attempts on goal were made by both teams, with Alisson saving a header from André Gomes and Joe Gomez clearing the rebound and a shot from Gylfi Sigurðsson.
[46] In the weekend fixture of 8 December, Liverpool won 4–0 against Bournemouth with a hat-trick from Salah and an own goal from Steve Cook, to move top of the league table.
In injury time, Arkadiusz Milik had a chance to equalize from eight yards away from goal, but his shot was denied by Alisson, who made a crucial save as Liverpool won 1–0 and qualify for the knockout phase.
[53] Liverpool kicked off the new calendar year with a daunting trip to the Etihad to face Manchester City, knowing full well a win could see their lead extended to ten points.
Liverpool pulled themselves level in the second half, Firmino scoring after the hour mark, but Sané won the game for City just under ten minutes later.
The West Midlands side could have even scored more, with Hoever making a fantastic last-ditch tackle to stop Jiménez closing in on goal with 15 minutes left.
A second bookable offence for Milner saw the Reds down to ten men and their lead under threat before Mané scored in added time to put the game beyond Palace.
[59] The Reds' next game came ten days later as a result of the FA Cup fourth round being played on the weekend of 26–27 January, with Leicester City welcomed to Anfield.
Aware that Manchester City had lost the previous day at Newcastle United, Liverpool had the chance to extend their lead at the top of the table once again but were ultimately frustrated by a resilient Foxes side.
[60] Liverpool's first game of the month came against West Ham United at the Olympic Stadium and finished in a second successive 1–1 draw, with Michail Antonio scoring just before the 30-minute mark to cancel-out another Mané opener.
[64] Liverpool's next match was away at Old Trafford to face rivals Manchester United, who had enjoyed an incredible resurgence under Norwegian interim manager Ole Gunnar Solskjær following his appointment after the club's loss at Anfield in December.
The game finished 0–0, the Reds having put in a poor performance against a United side that made all three substitutions in the space of 25 minutes in the first half and lucky to avoid a late loss, as a Joël Matip own goal was disallowed.
Mané extended his impressive run of goals with a brace in the first half before Origi scored shortly after the hour mark to put the game beyond Watford.
However, the team got off to a poor start after Ashley Westwood scored directly from a corner after just six minutes, though replays revealed that Allison had been impeded by Clarets defender James Tarkowski in the build-up.
Despite putting in a poor performance and being pegged back to 1–1 with 15 minutes to play — Ryan Babel scoring against his former club after a mix-up between Allison and Van Dijk — a 26th-minute goal from Mané and then an 81st-minute penalty from Milner ensured all three points for the Reds.
Despite making a slow start and having to weather several Porto attacks, the team took the lead in the 28th minute through a Mané strike that appeared offside but was finally given by VAR.
After a goal-less first half that saw the Bluebirds deal with the attacking threat from the Reds very well, the away side finally got the goal they needed, Wijnaldum scoring with a wonderful finish in the 56th minute.
[77][78] April came to an end on a high as Liverpool hosted already-relegated Huddersfield at Anfield, preparing for the first leg of their Champions League semi-final tie with a comfortable 5–0 win.
The second half was dominated with continued attacking pressure from Liverpool, but no goals came until Lionel Messi scored from close range after Suárez had hit the bar.
The Reds opened the scoring with a goal from Van Dijk, only for Christian Atsu to level the match a few minutes later, tapping home the rebound after Alexander-Arnold appeared to handle Salomón Rondón's shot on the goal-line.
Trailing with a 3–0 deficit and having had both Firmino and Salah injured prior to the game, many pundits and general media believed that it was highly unlikely for Liverpool to overturn the result.