Frustrated Bulls Lopez, Dunn exchange words

LOS ANGELES -- Losing is taking its toll on the Chicago Bulls. During the team's Monday practice in Santa Monica, Robin Lopez made an aggressive play on Kris Dunn, leading the two to exchange words. Lopez, seemingly angry, left practice for 15 minutes to cool off before returning.

While tough, chippy practices are not out of the ordinary in the NBA, the Bulls are in a particularly tenuous situation. Chicago has lost seven straight games, including a 37-point loss to Golden State, and it has yet to find its identity under coach Jim Boylen, who took over from Fred Hoiberg in December.

"We had a very, very competitive practice," Boylen said. "I felt like we had some guys who are sick of not…