England field against Sri Lanka in fourth ODI
File picture shows England captain Alastair Cook before the one-day international between Scotland and England at Mannofield ground in Aberdeen, northeast Scotland, on May 9, 2014 - by Ian MacNicol
Although conditions initially appeared ideal for batting, with sunny blue skies above Lord's, this series has been littered with collapses.
And given England had skittled Sri Lanka out for just 67 en route to a crushing 10-wicket win at Old Trafford on Wednesday that gave them a 2-1 lead in this five-match series, Cook's decision was perhaps not that surprising.
England were unchanged from the side that played in Manchester, where paceman Chris Jordan took a career-best five for 29.
But Sri Lanka made two changes, bringing in Kusal Perera for fellow batsman Dinesh Chandimal and spinner Ajantha Mendis for left-arm slow bowler Rangana Herath.
England: Alastair Cook (capt), Ian Bell, Joe Root, Gary Ballance, Eoin Morgan, Ravi Bopara, Jos Buttler (wkt), Chris Jordan, Harry Gurney, James Anderson, James Tredwell
Sri Lanka: Tillakaratne Dilshan, Kusal Perera, Kumar Sangakkara (wkt), Mahela Jayawardene, Lahiru Thirimanne, Angelo Matthews (capt), Ashan Priyanjan, Nuwan Kulasekara, Sachithra Senanayake, Ajantha Mendis, Lasith Malinga
Umpires: Marais Erasmus (RSA) and Ian Gould (ENG)
TV umpire: Chris Gaffaney (NZL)
Match referee: Jeff Crowe (NZL)