Top-tier heavyweight Alistair Overeem‘s return to the octagon is targeted for late summer, multiple sources close to the fighter told MMAjunkie.com (www.mmajunkie.com).

The former Strikeforce champion has been earmarked to compete at UFC 164, a pay-per-view event that takes place Aug. 31 at Milwaukee’s Bradley Center. His opponent has yet to materialize.

Overeem (36-12 MMA, 1-1 UFC), a 32-year-old Dutch striker, recently has encountered setbacks during his push for the UFC heavyweight title. He was scheduled to fight Junior dos Santos at UFC 160 before an injury forced him to withdraw.

At UFC 156 in February, he suffered a knockout loss to Antonio Silva, who is now set to rematch champ Cain Velasquez at UFC 160 on May 25 in Las Vegas. Prior to that, Overeem hadn’t lost a fight in six years and 12 bouts.

The defeat followed another hiccup in 2012. Prior to a scheduled title shot at UFC 146 against then-champ dos Santos, he tested positive for elevated testosterone levels and was denied a license to fight, which effectively barred him from competition for nine months.

Overeem signed a lucrative contract with the UFC in September 2011 after he was cut from the now-defunct Strikeforce, where he held the heavyweight title for four years.

For more on UFC 164, stay tuned to the UFC Rumors section of the site.