Mane's strike in Sunday's 2-1 win over Fulham saw him move level with Salah as the Reds' top scorer this season on 20 goals.
And the Senegalese's 26th-minute opener at Craven Cottage also means Mane and Salah are the first pair to register 20 or more goals in successive campaigns for Liverpool for 36 years.
In 2017-18, the duo scored 20 and 44 times respectively to help fire Jürgen Klopp's team to the Champions League final.
Club legends Rush and Dalglish were the last Liverpool twosome to reach the 20+ mark in back-to-back seasons, doing so in 1981-82 and 1982-83.