Malmö FF came into play with this summer's new acquisitions Niklas Moisander and Malik Abubakari.
However, attacking set Antonio Colak and midfield shadow Anders Christiansen were missing.
However, there were no problems.
Visiting Malmö started strong.
Ten minutes into the first half, Veljko Birmancevic, who started the match briskly, broke in from the left wing and fired a shot on goal - which Samuel Brolin saved.
After that, for the first 45 minutes, it was a home team that had to struggle to resist attacks.
Malmö often got ahead, but without success and the yellow-clad solid defense would mean 0-0 at half time.
Strong introduction to others
Birmancevic also impressed in the second half and made it tough for Mjällby.
In the 52nd minute, the 23-year-old fired a heavy shot that forced the Mjällby goalkeeper to a new save.
Two minutes later it was time again.
Birmancevic gave himself a good closing position and tried to place the ball in the right corner, the shot instead in the post that time.
However, the goal zero would be cracked.
After 58 minutes, Adj Nalic came in from the right, feinted, then sped past the off-balance defender to make the score 1 - 0, giving Mjällby the lead.
And after 61 minutes of play, Birmancevic finally got to score a goal.
Eric Larsson hit a long and high free kick against the running Serb, who tricked a rushing and misplaced Brolin, to then easily poke the ball to 2-0.
Malmö is now in first place in the Allsvenskan and will face Halmstads BK next. For Mjällby's part, Kalmar is waiting away.