Career
Sernas has played internationally for the Lithuania national football team Club career
In July 2011, he signed three-year contract with Zagłębie Lubin. In January 2014, it was announced that Šernas would go to Perth Glory on loan.
In his debut for Perth Glory against Melbourne Victory, Šernas scored his debut goal in the 50th minute, only 3 minutes after being substituted into the game.
Šernas" goal tied the game at 1–1, and ended the scoring. Sernas signed for Scottish Premiership club Ross County in 2015, but was released at the end of the 2014/15 season.
On July 6, 2015, it was announced that Šernas has joined Žalgiris Vilnius. International career.