The 41-year-old insists his side are raring to go ahead of the Bluebirds' clash at Craven Cottage, despite back-to-back defeats in both the Premier League and the Capital One Cup
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|14/5||Cardiff City are 14/5 with Bet365 to beat Fulham this weekend.
But despite that defeat – their second in three days – Mackay says the atmosphere within the club remains high ahead of Saturday's trip to Fulham.
"We went into that tie on Tuesday wanting to win it," he said. "We were unlucky not to take it to extra time, now we focus on Premier League.
"The mood in the camp is good, they're desperate to get going again against Fulham.
"As I've said before there's a real belief in this side that they've shown in the Premier League already this season."
Cardiff face a Fulham side struggling for form in the league, with Martin Jol's side without a win since the opening day of the season.
However, Fulham came from behind to beat Everton 2-1 in the League Cup on Tuesday and Mackay is not taking anything for granted.
"We know what we're facing against Fulham," he added. "They've got five or six match winners and a very experienced manager. We're looking forward to it."
One player who will not be part of Cardiff's squad is Kevin McNaughton, after the 31-year-old completed a one-month loan move to Championship side Bolton Wanderers on Friday.