Neil Harris praised goalkeeper Jordan Archer after his Millwall side played out a 0-0 draw against high-flying Cardiff City in the Sky Bet Championship on Saturday afternoon.
Chances were at a premium in south Wales, but the Scot had to be on hand to expertly stop two Bluebirds efforts as The Lions gained their fourth point on the road in the Championship this season.
"Jordan made two really good saves in the first-half. One low down, which was a top save," said Harris.
"When you go away from home against teams at the top of the League, you need your goalkeeper to be in top form. He was a massive part towards us keeping a clean sheet."
The manager also reserved praise for his whole side, who "competed" with Neil Warnock's outfit for large parts of the game.
"I thought we were excellent in the first 20 minutes, but then there was a period in which Cardiff dominated the game. I felt really comfortable and pleased with the second half - we competed.
"Away from home, it's a really strong performance by us and a clean sheet is a really good achievement. Cardiff are a strong and experienced Championship side, with a lot of know-how at this level."
The one major flashpoint at the Millwall end, however, was at the beginning of the second-half, as referee Mr Martin chose not to give a penalty-kick as Lee Gregory appeared to be hauled down on the edge of the box - a decision the manager said should have been given.
"We should've had a penalty at the beginning of the second-half - no question about it. It's a foul and it possibly changes the game if it's given. We could be coming away with three points and they're down to 10 men."