QPR defender Anton Ferdinand snubbed Chelsea's John Terry and Ashley Cole at the pre-match handshake at Saturday's Barclays Premier League clash at Loftus Road.
It was the first time that Ferdinand and Terry have met on a football field since the England centre-back's race trial in July.
Terry was found not guilty of using a racial slur against Ferdinand in the corresponding fixture last October, but remains the subject of a Football Association investigation over charges that he denies.
The QPR defender rejected the offer of his two rivals' outstretched hands before Saturday's game. Cole testified as a character witness for his Chelsea and England England team-mate at the trial.
Speaking after the game, Hoops boos Mark Hughes insisted he had no idea which of his players planned to snub Terry after Park Ji-Sung joined Ferdinand in blanking the Chelsea captain.
It was not known how many of Ferdinand's Rangers team-mates would follow suit but it was still a surprise to see skipper Park do the same, something the midfielder repeated during the coin toss.
Park spent seven years playing alongside Ferdinand's brother, Rio, at Manchester United and it is possible his decision was taken out of some sort of loyalty to his former team-mate.
Hughes said: "They had the discussion and I was made aware that some were prepared to shake the opposition's hand and some weren't.
"I didn't know which individuals and I wasn't going to push the point. It was a personal decision for each and every one of them."
Hughes was hoping talk of pre-match handshakes would draw to a close following the game.
Reiterating his opposition to the ritual, he said: "For goodness sake, we've been talking about it for God knows how long. I think it's done and dusted now.
"It's something and nothing in my view. I thought the game was what was important and, thankfully, it was played in good spirit."
He added: "You can't get too misty-eyed about the old days and how it used to be - a lot of things have moved on for the better.
"But I just think this element of the Respect campaign is something that causes more problems than it solves and I don't think that was its intention when it was introduced."
Opposite number Roberto Di Matteo shrugged off the double snub.
"Listen, we offered and we have done our part and if other people feel differently, that's not our problem," he said, refusing to give a clear answer when asked if he thought pre-match handshakes should be scrapped.
"I think we should shift the focus onto the football side. We are here for the 90-95 minutes and not what happens before and after the game."