This week, the UFC is back in Las Vegas at the UFC Apex for a heavyweight showdown. In the main event, Sergei Pavlovich takes on Curtis Blaydes in a fight scheduled for five rounds.

Elsewhere, many other MMA and boxing events are taking place that feature a number of familiar names that have competed under the UFC banner.

This weekend, there are a total of 18 veterans of the global MMA leader competing in MMA and boxing this week from April 21-23.

Check out the names and details about their bouts below.

Upcoming event information from Tapology.

Alexander Torres (7-6 MMA, 0-1 UFC)

Next fight: April 21 vs. Dumar Roa at MatchMaker 3

Last MMA fight: Submission win over Jon Zarate at MatchMaker MMA 1 on Dec. 10, 2021

Last UFC fight: Split decision loss to Masio Fullen at UFC 184 on Feb. 28, 2015

Record since UFC exit: 5-4

Chris Avila (8-9 MMA, 0-2 UFC)

Oct 29, 2022; Glendale, Arizona, USA; Chris Avila fights against Mike Varshavski at Desert Diamond Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports

Next fight: April 21 vs. Paul Bamba at MF & DAZN X Series 6 (boxing)

Last MMA fight: TKO win over Jon Kennedy at North Iowa Fights on July 31, 2021

Last UFC fight: Unanimous decision loss to Enrique Barzola at UFC Fight Night 98 on Nov. 5, 2016

Record since UFC exit: 3-5 MMA, 2-0 boxing

Liz Carmouche (18-7 MMA, 5-5 UFC)

Next fight: April 21 vs. DeAnna Bennett at Bellator 294

Last MMA fight: Submission win over Juliana Velasquez at Bellator 289 on Dec. 9, 2022

Last UFC fight: Unanimous decision loss to Valentina Shevchenko at UFC Fight Night 156 on Aug. 10, 2019

Record since UFC exit: 5-0

DeAnna Bennett (13-7-1 MMA, 0-0-1 UFC)

Next fight: April 21 vs. Liz Carmouche at Bellator 294

Last MMA fight: Unanimous decision win over Justine Kish at Bellator 284 on Aug. 12, 2022

Last UFC fight: Majority draw vs. Melinda Fabian at The Ultimate Fighter 26 Finale on Dec. 1, 2017

Record since UFC exit: 5-4

Tim Johnson (15-9 MMA, 4-3 UFC)

Next fight: April 21 vs. Said Sowma at Bellator 294

Last MMA fight: TKO loss to Linton…