Antunes claims there can be no better motivation than a visit from Barca.
Antunes told reporters: "I've got a great respect for them, but then I do for every team.
"We know that Barcelona are one of the best teams in the world, so playing them is a great motivation for us.
"We want to win our first home game of the season, all the more being against Barcelona, and will be doing all we can to earn the three points.
"They are a fantastic team and present a difficult game for any rival. However it's 11 against 11 on the pitch and we're determined to win.
"If we give it our all on Sunday, we're capable of victory and playing very good football."
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