The U.S. team has only scored one goal in three games under Klinsmann after its loss in Brussels.
The United States remained winless in three games under its new head coach after dropping a 1-0 decision to Belgium Tuesday night in Brussels, failing to score for the second straight game despite a new attacking style of play.
Belgium defender Nicolas Lomberts had the game's only goal early in the second half, drilling one from outside the box past an otherwise impressive goalkeeper Tim Howard.
"Difficult game, of course, and conditions weren't great, but it was nothing we didn't expect," Howard said. "It was OK, in spots, and in a big game in Europe you're going to have your back against the wall. For the most part I thought we were somewhat resilient.”
Since Klinsmann replaced former coach Bob Bradley in late July, the U.S. has recorded just one goal in three games as it holds 0-2-1 record under the new boss, whose promising offensive philosophy has yet to improve the American squad.
The U.S played a majority of the match on its heels, relying on Howard to keep the squad in the game. Midway through the first half, the Everton keeper made clutch saves on attempts from Timmy Simons in the 25th minute and Marouane Fellaini seven minutes later.
The U.S. team's best chance of the first half came when Jozy Altidore was unsuccessful on a rebound attempt off a Clint Dempsey free kick in the sixth minute, and the Americans didn't get another good opportunity until they fell into a one-goal hole in the 55th minute.
"It was an interesting game for both sides," Klinsmann said. "For the first 25 minutes the U.S. had a good passing game going, but then the individual Belgian class started to show. The players have learned a lot from the game."
Lomberts scored on a long-range strike through traffic that went under the diving Howard. The play was set up after the U.S. failed to completely clear a long throw-in from Belgium defender Toby Alderweireld that made its way into the center of the box.
It appeared the U.S. had scored the equalizer in the 86th minute after Maurice Edu hit a header into the back of the net, but the play was waived off by the referee on a controversial offside call.