When Roberto Firmino calmly stroked home an early opener in Liverpool's 2-0 win at Southampton, the Brazilian hit the 20-goal mark for the season.

And when Firmino produced an outrageous, ingenious flick to set up Mohamed Salah to score the Reds' second shortly before half-time, he took his tally of assists for 2017-18 to 11.

As such, the No.9 has now been directly involved in 31 goals in just 36 appearances so far this term.

Here, with the help of Opta, we've crunched the numbers behind Firmino's most productive campaign in front of goal for Liverpool to date...

Free: Watch all 20 of Firmino's goals so far this season

Goals

140.2 - Minutes per goal

19 - Goals from inside the box

12 - Right-footed goals

4 - Left-footed goals

4 - Headed goals

10 + 10 - First-half goals and second-half goals

46-60 minutes - The most common period in a game during which he scores (six goals)

4 - The number of assists Salah has provided to him (joint-highest with Philippe Coutinho) 

Assists

5 - The number of goals he has set up for Salah

2 - His total number of assists for Sadio Mane

4 - The number of other players to have received one Firmino assist each this season (Coutinho, Dejan Lovren, Emre Can and Alex Oxlade-Chamberlain)