The Spanish coach was unhappy with what he perceived to be some tough treatment dealt to his players in the game at Coopers Stadium this weekend
Gombau was particularly disappointed with the treatment handed out to star Argentine playmaker Marcelo Carrusca, who is unlikely to play in this Friday's clash with Sydney FC due to concussion.
Jets trio Taylor Regan, captain Ruben Zadkovich and Nathan Burns were all booked for three separate challenges on Carrusca, who eventually was forced to exit the game after copping repeated batterings.
Earlier in the week, Gombau pointed out the physicality of the Jets, who have racked up the most fouls and yellow cards of any A-League side this season, and Sunday's ill-tempered stoush did nothing to sway the Adelaide manager's opinion.
"I am disappointed with this because we need to protect the players," Gombau said.
"Carrusca got a strong concussion. We checked with the doctor ... the doctor thinks he cannot play on Friday.
"It's something we spoke (about) in the week, that they (Jets) make a lot of fouls.
"They made one foul (through Regan) at the end of the first half that can be (a) red (card).
"The referee's job is very difficult but we need to protect the players.
"That is important because this is not football - it is another sport.
"From this, the player (Carrusca) needs to go off, cannot finish the game and cannot play this week.
"I am disappointed with this."
Newcastle coach Gary van Egmond meanwhile insisted both sides were physical and guilty of 'poor challenges'.
"He (Gombau) is entitled to his opinion," he said.
"I think there were some poor challenges from both sides.
"The one that (Marcelo) Carrusca did on Ruben (Zadkovich) - although he (Zadkovich) didn't roll around 15 times - was a poor challenge.
"I think it's fair to say both sides were fairly physical out there.
"If I remember rightly, the last time we played, it was one of the Adelaide players that got sent off, not one of ours.
"It's a physical game - it's the nature of the sport."
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