Timo Werner scored his first goals since the Bundesliga returned from a two-month break amid the coronavirus pandemic as RB Leipzig thumped Mainz.
The 24-year-old Germany striker took his tally for the season to 30 with a superb hat-trick as his side won 5-0 to move third in the table.
Elsewhere on Sunday, pressure is mounting on Schalke boss David Wagner after his side lost 3-0 to Augsburg.
Schalke are now winless in nine games, and have scored only twice in that run.
And struggling Fortuna Dusseldorf were denied a vital win as Cologne came back from 2-0 down with three minutes left to draw 2-2.
