CENTURION, SOUTH AFRICA - FEBRUARY 15: Ryan McLaren of South Africa is hit by a delivery from Mitchell Johnson of Australia during day four of the First Test match between South Africa and Australia on February 15, 2014 in Centurion, South Africa. (Photo by Morne de Klerk/Getty Images)

Johannesburg – Proteas all-rounder Ryan McLaren has been ruled out for the second Test against Australia because of mild concussion.

McLaren was diagnosed with concussion, following a blow to the head from a bouncer by Australian fast bowler Mitchell Johnson on Saturday.

“Ryan was admitted to a Johannesburg clinic on Sunday evening suffering from suspected concussion-related symptoms including worsening headaches and nausea, which started approximately 30

hours after the blow to his head,” Proteas team manager Dr Mohammed Moosajee said in a statement on Tuesday.

“His condition improved overnight and he was re-assessed by a neurologist as well as a leading sports physician with a special interest in concussion, Dr Jon Patricios.”

Moosajee said McLaren was doing much better and was discharged from hospital.

“But from a medical protocol point of view, any form of concussion is concerning enough to rule him out of the next Test match,” he said.

“He will be monitored over the next four to five days and will have further assessment done next week Monday to decide whether or not he can join up with the squad prior to the third Test in Cape Town.”

The selectors had not added a player as cover and would make use of the 14 players in the squad.

The Proteas suffered a 281 run defeat to Australia in the first Test on Saturday.

The second Test starts in Port Elizabeth on Thursday. – Sapa