SYDNEY defender Zak Jones will come under scrutiny from Match Review Officer Michael Christian for reports in two separate incidents against Essendon on Friday night.

Jones was first reported for striking Bomber Zach Merrett before the opening bounce.

They were involved in a scuffle on the edge of the centre square that escalated when Jones made contact to Merrett's face with a left jab.

The umpire made an instant report and awarded a free kick to Merrett.

The key Swan was also reported in the final term, when he went to bump Kyle Langford and connected with the Bomber's head.

Langford was awarded a free kick and was able to take it, but later left the field before being taken to hospital.

Sydney coach John Longmire declined to comment on Jones' reports, but said he spoke with all his players about striking the right balance with their attack on the ball.

"I was hoping there wouldn't be a free kick at the start of the game and I don't want free kicks against," Longmire told reporters.

"Our free kick count tonight was something like 14-30 (14-28). It was huge. So I don't want to be giving those free kicks away. 

"It's a hard enough game as it is, let alone having the opposition more than double us in free kicks against, so at one stage there we had three free kicks to about 17 or 18. 

"We can't afford that – giving the ball back to them on a plate – so that's the first point of call."

Jones, 23, was reported three times in 2017 and most recently missed one match for striking Richmond's Dan Butler in round 13 last year.

He has become an important part of the Swans' side and would be a huge loss in crucial games against Collingwood, Melbourne, Greater Western Sydney and Hawthorn in the final four rounds.

Bombers star Devon Smith may also be looked at by Christian for an attempted trip on Swans midfielder Luke Parker in the final minutes before half-time.