Cardiff boss Mackay praise for Marshall in Spurs defeat
Mackay felt the defeat shows the challenge his side face in the top-flight.
"I don't think what you deserve comes into it, that's the harsh reality, they were clinical in the last minute and we weren't in the first minutes when we were through on goal," he said.
"David is a top goalkeeper, I think their goalkeeper cost £9million and I look at my keeper today and see him step up. He was the best in the Championship and he is in the Premier League, back in the Scotland squad and he has looked so comfortable in the games we have played against some top teams."