Dinamo Zagreb midfielder Jerko Leko, who was called up earlier in the year before being sidelined with a broken rib, and defender Filip Tapalovic of TSV 1860 Munich are also in line for their first caps.
Croatia continued to push for the opener right up to the break and Jerko Leko sent a low 20-meter shot fizzing just wide of Boruc's right post, before the Polish number one did superbly to save from Klasnic on the stroke of half-time following another one-on-one with the Croatia hitman.