Rivers revealed his concerns about his star's health and conditioning after a lengthy layoff.
The Milwaukee Bucks fell 129-114 to the Phoenix Suns on Tuesday night at Fiserv Forum, and the final score wasn't even the biggest concern coming out of the locker room.
Head coach Doc Rivers had his eyes on Giannis Antetokounmpo all night, and what he saw had him holding his breath.
Antetokounmpo, just four games into his return from a lengthy calf strain that kept him out since January, went down twice during the game and gave everyone on the Bucks sideline a scare.
Rivers Didn't Hold Back
Rivers was honest about what went through his mind when he saw his star go down.
"Yeah, I don't know, I was scared," Rivers said. "The one time he went down in the first half, he said he was fine, he just tripped over a guy's foot, so there was no injury."
The second scare came when Antetokounmpo took a hit to the groin, and the way he went down made Rivers fear the worst.
"And then he got hit in the groin," Rivers continued. "And I'm thinking that's a calf the way he went down, that's what you think and then he told me that."
Rivers said Antetokounmpo was also visibly winded as the game went on, pointing to the Suns' pace as a major factor.
"And then he was just winded. Phoenix plays at a high pace, draw and kick, and it takes multiple efforts and a lot of players to play them," Rivers said. "We didn't have the players with a lot of guys out. And I thought, as the game went on, you could see it wearing us down."
Phoenix Was Too Much
The Suns were firing on all cylinders Tuesday night as Devin Booker led the way with 27 points, Jalen Green added 25, and Royce O'Neale chipped in 21.
Phoenix shot 53.9 percent from the field and knocked down a season-high 24 threes on 51 attempts.
Kyle Kuzma had a season-high 33 points and Antetokounmpo added 22 points, six rebounds, and three assists in 32 minutes, but Milwaukee couldn't keep up.
The Bucks trailed just 100-97 heading into the fourth, but Phoenix opened the final frame on a 7-0 run and Milwaukee ran out of gas from there.
The 38-27 Suns have now won five of their last six as they push for a playoff spot in a loaded Western Conference.
Time to Shut Giannis Down
The Bucks have fallen to 27-37 on the season and have now lost six of their last seven games.
Antetokounmpo has only suited up for 31 games this season because of the calf injury, and even when he has played, Milwaukee hasn't strung together any kind of winning streak.
At this point, why is Giannis still playing?
The frustration has been building all year and with just 18 games left, there is no reason to risk further injury to a player averaging 27.7 points, 10.1 rebounds, and 5.5 assists when healthy.
The trade rumors about Giannis's future aren't going anywhere, and the last thing Milwaukee needs is for their franchise cornerstone to suffer a serious setback in a lost season.
Rivers admitted he was scared watching Giannis go down, and if the coach is scared, that should tell the front office everything they need to know.
Milwaukee needs to shut Giannis down for the rest of the year and focus on the offseason, where the real decisions about this franchise's future will be made.