On 1 September Korean Air began 3/week ICN-ZAG flights using A330-200s. There's no competition on this route, which is the first direct service between Asia and Croatia.
And on 30 August, Asiana Airlines began 4/week ICN-BCN flights using 777-200s. Korean Air has flown the same route since April 2017.
Both these routes look to have good potential for reciprocal tourism.