Spence-TszyuCredit: No Limit BoxingLet’s keep it real. The loser of the Errol Spence Jr. vs. Tim Tszyu fight will be urged to retire — even if that man doesn’t make an official announcement in the ring. This is a crossroads fight for both former champions, and that makes it a compelling fight. Here is everything you need to know about this battle in Australia. Let's talk boxing.Key Facts at a GlanceEvent: Errol Spence Jr. vs. Tim Tszyu, "USA vs. AUS" (PBC pay-per-view)Date/venue: Saturday, July 25 for U.S. viewers (Sunday, July 26 local) · Afterpay Arena, SydneyMain card start: 9 p.m. ET / 6 p.m. PTMain-event ring walks: approximately midnight ETWeigh-in: [weights to be added]Broadcast: PBC PPV on Prime Video ($79.99 U.S.), DAZN, £24.99 U.K.Records: Spence 28-1 (22 KOs) · Tszyu 27-3 (18 KOs), contested at 160 lbsWhat Time Does Errol Spence Jr. Vs. Tim Tszyu Start?The main card is set for 9 p.m. ET / 6 p.m. PT, with main-event ring walks expected around midnight ET. It runs from Sydney's Afterpay Arena on PBC pay-per-view via Prime Video at $79.99 in the U.S., with DAZN also carrying it and a £24.99 price in the U.K.MORE FOR YOUThe Sydney start makes it a late U.S. night and an overnight in Britain, and it shares the calendar with Joshua vs. Prenga in Jeddah, so Saturday runs wall-to-wall.Errol Spence Jr. Vs. Tim Tszyu Weigh-In ResultsBoth men step on the scale in Sydney for a full 160-pound middleweight main event, bumped up from a 158-pound catchweight at Spence's request. It marks the heaviest contracted weight of Spence's career, a long way from the 147 he ruled, and Tszyu's first bout as a full-time middleweight.[Weigh-in results to be added.]Who Else Is On The Errol Spence Jr. Vs. Tim Tszyu Card?The full card is headlined beneath by two-division champion Stephen Fulton Jr. against Liam Wilson in the co-main. Callum Peters vs. Ivan Actis opens the pay-per-view, with Paul Fleming vs. Ahmad Reda and Paulo Aokuso vs. Luis Tejeda also scheduled across a seven-fight lineup.What's At Stake For Errol Spence Jr. And Tim Tszyu?Spence hasn't fought since the ninth-round stoppage loss to Terence Crawford in 2023 and has openly floated retirement, returning now under trainer Ronnie Shields. Tszyu, son of Hall of Famer Kostya, is rebuilding from losses to Sebastian Fundora and Bakhram Murtazaliev and has never lost on home soil. The winner reopens a path toward a title; the loser hears the retirement drumbeat the whole build has been pointing toward, as Spence framed when he confirmed this comeback.