Marcelo Bielsa was frustrated by Leeds United's final result after hanging on to Swansea despite the dominance of the Sky Bet Championship match.
Goals from Pontus Jansson and Jack Harrison in the first half gave Bielsa an impressive win, but Leeds missed out on many occasions and had to postpone the Swans' charge after Oli McBurnie's 87th-minute penalty. .
United scored a 2-1 win that took them to the top of the table after Norwich's loss to Preston and allowed them to begin a 10-day break in top form.
"I think we deserved to win," said Bielsa. "It's hard to understand why we only won one goal because we dominated the game and had plenty of chances to score.
"When we win the match, we can wait for the next match with serenity."
Leeds played Wednesday in Middlesbrough after a draw at the end of the match. This match was overshadowed by the collapse of Jack Clarke in the final semifinal.
The 18-year-old is recovering after being released from the hospital late Saturday night and Bielsa told his winger that the victory against Swansea was for him.
"We would like to dedicate this victory to Jack Clarke because each of us feels that he deserves this win," said Leeds head coach.
"We hope that he will recover well and let him take all the time he needs to recover."
The match had an advantage after Swansea ended the late-night move of Daniel James to Leeds and the video game presented on his first return to Elland Road since his disappointed departure a fortnight ago.
James was replaced in the middle of the second period by a good reception from both sides.
The swan boss, Graham Potter, was proud of the 21-year-old character after two difficult weeks.
"It was a difficult night for him, but he did his best," he said. "It was not an easy night for anyone.
"He had dangerous moments and we could see what he was doing. He will get better and learn from this experience. "
Despite a second defeat in eight games, Potter is encouraged by the performance of his team.
"Leeds is as likely to be promoted as anyone from what I've seen," he added.
"It's a tough test like the one we've had this season. Leeds is a good team and has played well.
"You have seen the character of our players do not fall because you can very easily go under here. They did not stay and stayed in the game. It's a learning point for them as they move forward.
"You can not just dominate the matches and play nice football in these places. You must survive and dig. We did this to allow us at least to fight in the end. "