The first four fights of this summer's UFC event in Chicago have been announced, with three welterweight bouts and one heavyweight matchup on their way to the United Center on July 23.

Looking to make noise in the stacked 170-pound weight class will be six veteran competitors, with Alexander Yakovlev taking on Ryan LaFlare, George Sullivan battling Hector Urbina and Alex "Cowboy" Oliveira returning to square off with James Moontasri.

In the heavyweight division, unbeaten Russian heavyweight Dmitry Smolyakov, who has finished all eight of his pro bouts, will make his Octagon debut against Brazil's Luis Henrique.

Stay tuned to UFC.com for more fight card announcements, including the UFC on FOX main event, and ticket information.