Joe Root felt England's calmness under pressure was the key to securing victory in the second Test against Sri Lanka – but insisted there is still room for improvement ahead of the tour to India. 

England trailed after both teams had batted once in Galle, yet four wickets apiece for spinners Dom Bess and Jack Leach helped turn the game their way. 

Sri Lanka rather self-destructed with the bat – something Root revealed the tourists had hoped to bring about by "creating a bit of chaos" - and left their opponents needing just 164 to seal a 2-0 series sweep. 

Dom Sibley anchored the chase, scoring 56 not out having managed only six runs combined in his three previous knocks, while Jos Buttler made an unbeaten 46 to help complete a six-wicket triumph. 

"It was a fine performance in this game. To come out on top having lost the toss on a wicket that, for the majority of the game, we had the worst part of is a testament to the character of the boys," Root said at the post-match presentation ceremony.

"In that second innings, at the back end, it was about dealing with pressure. I thought a number of guys in a very difficult run chase showed a lot of maturity, calmness and poise to see us home. It's a brilliant way to finish the series.

"When we came to bowl, it was about creating a bit of chaos, making it difficult for Sir Lanka to score boundaries.

"We knew if we could build pressure and try and really squeeze the game, we'd create opportunities on that surface. Thankfully, that worked out for us."

He added: "The one thing I'm proud of within our group is how calm we were; how clear we were over how we were going to score runs on that wicket in that chase."

England have little time to bask in their latest success, however, as they head on to India for a four-Test series. For Root, the aim is to keep on progressing during what is a hectic 2021 schedule.

Still, they have won five successive Test matches overseas for the first time since 1914, while they will be boosted by the return of Jofra Archer and Ben Stokes in India. Rory Burns is also available again; the opening batsman missed the Sri Lanka trip to be present for the birth of his first child.

"As a team, we are moving forward all the time. We are on a little bit of an upward curve and we've just got to keep on looking to get better," Root - who scored 426 runs in the series at an average of 106.5 - said.

"With four more Tests to come on this tour for us, it's really important we don't stand still. We are not happy with what we have achieved so far, we will keep looking to improve all the time. 

"There will be different challenges, different surfaces to deal with and situations to manage in the coming games, but can we have that same attitude, that same desire to want to improve all the time."

The England and Wales Cricket Board confirmed on Monday that New Zealand will visit in June, playing Root's side in Tests at Lord's and Edgbaston.

England will also play three Twenty20 fixtures and a trio of one-day games against Sri Lanka.