The Reds won 1-0 thanks to Virgil van Dijk's second-half headers.
Speaking post-match, Le Bris said: “They are a good team and they played well.
“We struggled a little to find the right distance against smart, agile players who are comfortable on the ball. At times we were Sunderland, we tried to be competitive, and the second half was better.
“We were more organised on the pitch and had our opportunities, but small margins define these kinds of games.
“In the final third, they were good. We tried, and the team spirit was excellent once again, but it was a question of details - and details make the difference,” he continued.
“It has been a good sequence of home results this season. We want to win points, and the mentality of the squad has been excellent.
“We have to be resilient, and that is part of our journey in the Premier League against teams like this - we must keep going.
“We are learning fast, and we have to go through difficult experiences. Tonight’s experience will be useful for the future.”