Dostal turned aside 40 shots in Tuesday's 3-1 win over the Islanders.
Dostal's shutout bid was spoiled by a Mathew Barzal power-play goal early in the third period, but it was still another stellar performance from the 24-year-old netminder. The 2018 third-rounder is 4-2-1 to begin the season with a 2.00 GAA and .943 save percentage, and while the return of John Gibson (abdomen) from IR might lessen his workload, Dostal seems to have a firm grip on the starting job in the Ducks' crease.