It was a match with plenty of incidents, and Kewell has recognised that his side fared admirably when faced with a tactical approach intended to knock them out of their rhythm.
The Australian told Watford's official website: “Leeds were disappointed, and they looked to roughen us up a little bit to put us under more pressure, and they did do that well in the second half.
“They probably had more chances but we did well, we tucked in, we were talking, we were holding off, and we were fighting."
Kewell's assessment of the game being slightly 'rough' was backed up by the fact that Leeds' under-21 captain, Lewis Coyle, was sent off for a full-blooded tackle.
Coyle lunged at Ashley Charles in the 55th minute and was given a straight red card by the referee.
Kewell, who represented Leeds during his playing days, was clearly pleased with the way his side acquitted themselves against a talented opponent.
The Whites have one of the most productive youth systems in the country, and their youngsters will be looking to bounce back from this defeat quickly.