Many newspapers had their back pages containing a story of an altercation between the pair but Hiddink played down the incident and said here will be no disciplinary action as the matter has been resolved.
He told reporters at his weekly press conference, as shown on the Chelsea website: “They stumbled over the ground, stood up as a normal reaction and chested a bit, without a more serious reaction. We came inbetween but there is no need to say we avoided them hitting.
“We had an intense, very sharp session, it was on the edge. Afterwards, Oscar apologised to the team, and they started laughing.”
After a poor first half of the season which still sees the side in the bottom half of the Premier League, attentions turn to their FA Cup third round tie against Scunthorpe United on Sunday, and given the side's position in the Premier League, Hiddink has said the competition is a big target for the club.
Radamel Falcao, Eden Hazard and Loic Remy are all sidelined for the game as Hiddink hopes to start a campaign reminiscent of his last in 2009, when Chelsea lifted the trophy.
"We have to have some aims of course, when you are a big club you have to have some targets. Fourth place is difficult, so that's two targets left so the FA Cup is a big target.
"We are unbeaten four times in a row, it wasn't done in the past (earlier on in the season) but it must be standard for a club like Chelsea.
"The win against a very difficult team against Crystal Palace, but you have to have a follow-up which means in the coming games we have to show what we are capable of."
Hiddink reaffirmed that he will not be continuing the job beyond this season if he is successful during his second spell in charge.
“No. Now we made it very clear at the end of this spell then I will stop.”