England have little experience of playing the unorthodox finger and wrist-spinner, although they coped well enough during last year's Champions Trophy in South Africa.
Sangakkara wasn't, though, going to make life any easier for England by letting them know Sri Lanka's side in advance of the toss and, asked about Mendis's possible inclusion, replied: "We'll have to have a think about that, how it works with our combination and our batting.
"We would love him to play. He's a top quality spinner, and England have probably played him once.
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"It's a realistic possibility, but we've got other spinners who are pretty good at what they do.
"We've got a lot of variation in our bowling attack and will try to exploit that in these conditions - which, I think, are a bit more suited to us."
Sri Lanka, last year's