UFC 189: Mendes vs. McGregor and TUF 21 Finale viewing and schedule guide

Two title fights and an "Ultimate Fighter" champion will be crowned this weekend as the UFC presents a pair of star studded cards, including Chad Mendes facing Conor McGregor and Robbie Lawler putting his belt up for grabs against Rory MacDonald.

UFC 189 has undergone a few changes after featherweight champion Jose Aldo was forced to drop off the show due to injury, but Mendes is more than willing to step up and face McGregor with the interim belt up for grabs.

Lawler will look for the first defense of his welterweight title when he meets MacDonald on Saturday night and then on Sunday "The Ultimate Fighter" takes over with the final fight of the season along with another welterweight tilt between Jake Ellenberger and Stephen "Wonderboy" Thompson

To make sure you don’t miss a minute of the action, here’s a complete viewing and schedule guide for everything happening at UFC 189: Mendes vs. McGregor and "The Ultimate Fighter" finale from Las Vegas.

Friday at 7 p.m. ET — UFC 189: Mendes vs. McGregor weigh-ins

Where to watch: FOX Sports 1 or FOX Sports GO

To officially kick off the fight weekend, get ready to see all the fighters hit the scale before staring down just 24 hours away from the show. The weigh-ins oftentimes can tell the tale before the fights on Saturday night so this is a great way to see who has the edge before even stepping foot in the cage.

Saturday at 4 p.m. ET — ‘Ultimate Fighter’ finale weigh-ins

Where to watch: FOX Sports 2 or FOX Sports GO

Just hours ahead of UFC 189, watch the fighters from "The Ultimate Fighter" Finale hit the scale before they face off on Sunday night.

Saturday at 7 p.m. ET — UFC 189: Mendes vs. McGregor early prelims

Where to watch: UFC Fight Pass

Two fights will kick off the night from Las Vegas live on the UFC’s digital streaming service, Fight Pass. The fights are:

Neil Seery vs. Louis Smolka

Yosdenis Cedeno vs. Cody Pfister

Saturday at 7 p.m. ET — UFC 189: Mendes vs. McGregor pre-fight show

Where to watch: FOX Sports 1 or FOX Sports GO

Before the action kicks off at the bottom of the hour on FOX Sports 1, get the best analysis and preview of UFC 189 from the fighters and experts on the panel giving predictions and a full technical breakdown of several fights on the card, including the two title fights headlining the card.

Saturday at 8 p.m. ET — UFC 189: Mendes vs. McGregor prelims

Where to watch: FOX Sports 1 or FOX Sports GO

Before the main card starts on pay-per-view, the UFC 189 prelims kick off on FOX Sports 1, including a welterweight showdown between two of the best strikers in the division as Matt Brown meets Tim Means in a potential show-stealer for the entire card. The four fights featured on the prelims are:

Matt Brown vs. Tim Means

Mike Swick vs. Alex Garcia

Cathal Pendred vs. John Howard

Cody Garbrandt vs. Henry Briones

Saturday at 10p ET — UFC 189: Mendes vs. McGregor

Where to watch: Pay-Per-View

A new interim featherweight champion will be crowned as Conor McGregor tries to live up to the prophecies he’s been touting since the day he arrived in the UFC as he faces two-time title challenger Chad Mendes in the main event. The welterweight title will also go up for grabs as Robbie Lawler takes on Rory MacDonald in a five-round bout. The fights are:

MAIN EVENT: Chad Mendes vs. Conor McGregor (interim featherweight title fight)

CO-MAIN EVENT: Robbie Lawler vs. Rory MacDonald (welterweight title fight)

Dennis Bermudez vs. Jeremy Stephens

Gunnar Nelson vs. Brandon Thatch

Thomas Almeida vs. Brad Pickett

Sunday at 1:30 a.m. ET — UFC 189: Mendes vs. McGregor post-fight show

Where to watch: FOX Sports 1 or FOX Sports GO

Following the night’s action, don’t change the channel. To hear a breakdown of all the events that just happened as well as exclusive post-fight interviews with the biggest winners of the night, keep it locked to FOX Sports 1 with the special UFC post-fight show.

Sunday at 6 p.m. ET — TUF 21 Finale pre-fight show

Where to watch: FOX Sports 1 or FOX Sports GO

A look ahead at "The Ultimate Fighter" finale, including analysis on the main event between Jake Ellenberger and Stephen ‘Wonderboy’ Thompson.

Sunday at 7 p.m. ET — TUF 21 Finale prelims

Where to watch: FOX Sports 1 or FOX Sports GO

Before the main card starts on pay-per-view, "The Ultimate Fighter" finale will kick off with four fights. The fights included will be officially announced following the season finale of the reality show this Wednesday night on FOX Sports 1.

Sunday at 9 p.m. ET — TUF 21 Finale

Where to watch: FOX Sports 1 or FOX Sports GO

A new "Ultimate Fighter" champion will be crowned in the bad blood feud between American Top Team and the Blackzilians as well as a welterweight main event pitting Jake Ellenberger against Stephen "Wonderboy" Thompson

MAIN EVENT: Jake Ellenberger vs. Stephen "Wonderboy" Thompson

CO-MAIN EVENT: TUF 21 final fight

Jorge Masvidal vs. Cezar Ferreira

Michelle Waterson vs. Angela Magana

More fights to be announced following the TUF season finale on Wednesday night.

Monday at midnight ET — FOX Sports Live UFC post-fight show

Where to watch: FOX Sports 1 or FOX Sports GO

A final breakdown of the TUF Finale as part of FOX Sports Live airing on FOX Sports 1 late Sunday night.