One of Ireland's greatest medal hopes has been defeated.
Ireland boxing captain and flag-bearer was defeated in the last-16 of the 49kg boxing tournament at the Rio 2016 by
Spain's Samuel Carmona Heredia.
The great and good of the fight game were proud of the Belfast boxer's brave performance in a stand-up war.
Robot Wars presenter Dara Ó Briain was fired up.
https://twitter.com/daraobriain/status/762666366910341121
So was an Irish world champion and former Olympian.
https://twitter.com/AndyLeeBoxing/status/762666401815465985
A well-respected coach in a different fight game was in awe of the battle he witnessed.
https://twitter.com/John_Kavanagh/status/762667634156417026
Others thought Barnes looked devoid of energy after cutting the weight.
https://twitter.com/NialOFarrell/status/762667612878860288
https://twitter.com/Fergz16/status/762667750493974528
https://twitter.com/ConorMcNamaraIE/status/762668009714581504
However most people reacted to news of Barnes' defeat by recalling his Twitter goading of Rory McIlroy since arriving at the Olympic Village in Rio de Janeiro.
https://twitter.com/kenegan30/status/762675120368386049
https://twitter.com/JohnBrewinESPN/status/762665939410284545
https://twitter.com/willsy2929/status/762666715754983424
https://twitter.com/ach59/status/762666678316568576
https://twitter.com/Conor_Watson2/status/762668419091197953
https://twitter.com/nailor9/status/762666680531185664
https://twitter.com/seanmeli/status/762666643885613056
https://twitter.com/gscott92/status/762667365851168769
https://twitter.com/kevinhunt2/status/762667691496931328
However, lots of sports fans were genuinely shocked and devastated at the defeat of a boxer who won bronze medals in Beijing and London.
https://twitter.com/CiamhieMc/status/762666712202436608
https://twitter.com/averageESCpage/status/762667855439622144
https://twitter.com/jpconnelly74/status/762672724703674368
Aidan O'Shea on those diving accusations and Paul Galvin's solution for sledging on the GAA Hour. Subscribe here on iTunes.
https://soundcloud.com/sportsjoe-gaa-hour/aidan-oshea-opens-up-on-diving-controversy-and-paul-galvin-tells-us-all-about-being-targeted