Terry said of the Arsenal starlet: "The lads all said that Theo came out of his shell a bit on the last trip with England.
"But let's not put too much pressure on him. He is an exciting talent and a really good player for the future and for this campaign.
"But we must not start saying it is all down to him and that he is the only way forward.
"At the World Cup two years ago, everyone was looking at Theo. But he didn't get his chance.
"Everyone gets on the edge of their seat with him. He causes lots of problems. Arsene Wenger can look after him well enough when he is with Arsenal, when he comes away with England we don't want to put too much pressure on him."