Bulls' coach Vinny Del Negro is upset with his team's play as of late and would like to see a little more effort from his players.

"Every game is a challenge," Del Negro said after the team's loss to Milwaukee on Wednesday night. "We can't rely right now on anything other than playing hard and trying to improve. We're not good enough to say, 'Look at the schedule.'

"Like I've said all along, we're unpredictable. I feel we can beat anybody and that's the beauty of the NBA. But if we don't go to work every night and know what our job is, it's difficult no matter who you play. These are pro teams you're playing and they want to win as well."