The Champions League play-off Napoli-Athletic Bilbao will be officiated by Swede Jonas Eriksson.
The first leg of this clash will take place on Tuesday at the Stadio San Paolo.
UEFA have assigned Swedish referee Eriksson to the game with Klasenius and Warnmark as his assistants.
The fourth official will be Gustavasson.
This won’t be Eriksson’s first match in charge of Napoli, as he already officiated a 1-1 draw with Manchester City in September 2011.
In 2012 he had the whistle for Athletic Bilbao’s 2-1 Europa League semi-final defeat to Sporting Lisbon.
More recently, the multi-millionaire Swede officiated the 2013 European Super Cup between Chelsea and Bayern Munich, while he was also at the 2014 World Cup.