United are next in action on September 14 when they take on top-of-the-table Liverpool.
But before he can worry about what lies ahead from Mo Salah, Sadio Mane & Co, Dubravka is primed for a European Championship qualifying games against Croatia and Hungary.
Slovakia take on beaten World Cup finalists Croatia on Friday night before heading to Budapest.
The 30-year-old said: “I have a good session for the national team – we have two very difficult games – so I need to be ready for international duty now, and then I will try to get ready for Liverpool.
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“It’s tough to play against Liverpool. We’ve played them many times. It’s difficult always to play against top sides.
"In this Premier League anything can happen. Hopefully we will be in good shape.”