AP Photo/John Raoux
Earlier in the year, Trump praised Rousey as a great fighter, but she made it clear that she was no fan of the Republican presidential front-runner.
So Trump noted with glee that Rousey suffered a massive upset in a Saturday-night fight.
"Glad to see that @RondaRousey lost her championship fight last night. Was soundly beaten - not a nice person!" Trump tweeted Sunday.
T-Mobile CEO John Legere used the opportunity to bash Trump as bombastic.
"Donald I dare you to get in ring with her and say that... In fact I would pay big $ to see it," he wrote back. "I wonder which intern will get blamed for this stupid tweet."
Trump has repeatedly dismissed T-Mobile's "terrible" service since he and Legere exchanged Twitter shots in April. He did so again Sunday night:
.@JohnLegere @TMobile John, focus on running your company, I think the service is terrible! Try hiring some good managers.
- Donald J. Trump (@realDonaldTrump) November 16, 2015
"@StreetR77: @JohnLegere @TMobile didn't know he was CEO of tmobile, I have T-Mobile, it's pathetic, dropped calls, no service."
- Donald J. Trump (@realDonaldTrump) November 16, 2015
.@realDonaldTrump trumps last 4 tweet topics 1. Legere/@TMobile 2. Obama/Putin 3. Tom Brady 4. Legere/@TMobile .. President material?
- John Legere (@JohnLegere) November 16, 2015
@micahlmartin @realDonaldTrump and many that will be calling for #trumpdump pic.twitter.com/CGx8zdX7TO
- John Legere (@JohnLegere) November 16, 2015