Ireland without Robbie Henshaw for third Test against South Africa

• Centre to fly home before deciding Test for surgery on knee cartilage• South Africa have upper hand for Port Elizabeth after remarkable comebackIreland head into the last week of their longest season knowing they have lost the upper hand in the series with South Africa and will face the third Test in Port Elizabeth on Saturday without Robbie Henshaw.The centre is expected to fly home on Monday and will need surgery on an injury to his knee cartilage, sustained in the second half of the second Test which the Springboks won with a remarkable comeback. The implications for Leinster, where Hensh…