Eoin Morgan remained non-committal about how long he will captain England but is optimistic about overseeing the next two T20 World Cup campaigns and did not rule out continuing to the defence of their 50-over crown in 2023.

Morgan took some time to contemplate his future in the weeks after leading England to a historic triumph following their victory over New Zealand in the final at Lord's last July.

He was at the helm for their Twenty20 series win over New Zealand at the back end of last year, when the Irishman indicated he would like to continue in his position at this year's T20 World Cup in Australia.

Ahead of the one-day international series against South Africa which marks the start of the cycle towards the next 50-over World Cup, Morgan believes he could be in situ for the 2021 T20 World Cup in India and possibly beyond.

"I've looked at the next two T20 World Cups and I feel in a good enough space right here and now to be able to say I'm hoping to be here for both of them," he said on the eve of the first ODI in Cape Town on Tuesday.

"But things change, when you make decisions to stay on or continue, the majority of the time, that decision is taken out of your hands.

"For me it's a matter of focusing on this year's T20 World Cup, doing the best we can to put ourselves in a position to try to win it and then look beyond that as well."

Morgan will be 36 by the time England travel to India to defend their crown in three years' time but the Dubliner is bullish about how he has performed in recent years, as well as how he has matured as skipper.

He added: "I don't think for one instance that guys are taking the position we are in for granted but also they will look further beyond winning one World Cup.

"Days like the T20 World Cup final in 2016, losing down here in the fashion that we did the last time we were here, really do contribute to creating that drive moving forward.

"Us recognising things don't last forever, and trying to make the most of it is extremely important because sides over the years have had unbelievably great individual players but actually haven't won a great deal.

"We are very fortunate to have won something but the drive forward is extremely important."

Morgan spoke shortly before England's final training session, which got off to a false start as they posed for a team photo, with the famous Table Mountain backdrop obscured by smoke from outside the ground.