Official fighter weigh-ins for next week’s UFC 163 event take place Friday, Aug. 2, at Rio de Janeiro’s HSBA Arena. The same venue hosts the following night’s pay-per-view event, which features a championship headliner between featherweight champion Jose Aldo (22-1 MMA, 4-0 UFC) and challenger Chan Sung Jung (13-3 MMA, 3-0 UFC). The weigh-in festivities kick off at 3 p.m. ET (4 p.m. BRT local time), and as always, you’ll be able to watch a live video stream of the proceedings on the MMAjunkie.com (www.mmajunkie.com) homepage. Prior to the weigh-ins, UFC 166 headliner and title challenger Junior dos Santos joins a Q&A session hosted by Paula Sack, which begins at 2 p.m.