"I have been watching the Sri Lanka series pretty closely to try and see if I can take advantage out of what is existing there, how Sri Lanka is playing. Sri Lanka is pretty close to what we are doing in terms of sub-continental conditions. So trying to take a leaf out of that," said the India spinner at a function organised by Gillette here today.
"I can only pick up what he (Herath) did well and see what I can jot down. I watched the game. I was having a look at how the condition was and if the conditions are going to be similar.
"Sri Lanka has got a couple of good seamers and a good batting line up as well so you never know what their (England) strategy is going to be against us," he added.
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The other Tests are to be played at Lord's (July 17-21), Ageas Bowl in Southampton (July 27-31), Old Trafford (August 7-11) and The Oval (August 15-19).
Ashwin felt the way India start the five-match rubber would set the tone for the rest of the series.
"In any long series I believe how well you start is very important. We have got a few practice games and we can jot down something which can be really useful for us," said the Tamil Nadu bowler who is the fastest Indian bowler to take 100 Test wickets.