Alastair Cook of England looks dejected after being dismissed by Trent Boult of New Zealand during day one of the Second Test match between New Zealand and England at Hagley Oval on March 30, 2018 in Christchurch, New Zealand. Kai Schwoerer / Getty Images
England's Alastair Cook reacts as he walks off during the Second Test at the Hagley Oval, Christchurch, New Zealand. Paul Childs / Reuters
England's Alastair Cook (L) is bowled during the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on March 30, 2018. Marty Melville / AFP
England's Alastair Cook walks from the field after New Zealand won the Test series during day five of the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on April 3, 2018. Marty Melville / AFP
England batsman Alastair Cook leaves the wicket after being dismissed during day three of the Second Test Match between the New Zealand Black Caps and England at Hagley Oval on April 1, 2018 in Christchurch, New Zealand. Stu Forster / Getty Images
England's Alastair Cook (C) bats, watched by New Zealand's Tom Latham (L) during day three of the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on April 1, 2018. Marty Melville / AFP
England's Alastair Cook bats during play on day three of the second cricket test against New Zealand at Hagley Oval in Christchurch, New Zealand, on Sunday, April 1, 2018. Mark Baker / AP Photo
England's Mark Stoneman (R) and teammate Alastair Cook walk onto the field during the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on March 30, 2018. Marty Melville / AFP
Alastair Cook of England looks dejected after being dismissed by Trent Boult of New Zealand during day one of the Second Test match between New Zealand and England at Hagley Oval on March 30, 2018 in Christchurch, New Zealand. Kai Schwoerer / Getty Images
England's Alastair Cook reacts as he walks off during the Second Test at the Hagley Oval, Christchurch, New Zealand. Paul Childs / Reuters
England's Alastair Cook (L) is bowled during the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on March 30, 2018. Marty Melville / AFP
England's Alastair Cook walks from the field after New Zealand won the Test series during day five of the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on April 3, 2018. Marty Melville / AFP
England batsman Alastair Cook leaves the wicket after being dismissed during day three of the Second Test Match between the New Zealand Black Caps and England at Hagley Oval on April 1, 2018 in Christchurch, New Zealand. Stu Forster / Getty Images
England's Alastair Cook (C) bats, watched by New Zealand's Tom Latham (L) during day three of the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on April 1, 2018. Marty Melville / AFP
England's Alastair Cook bats during play on day three of the second cricket test against New Zealand at Hagley Oval in Christchurch, New Zealand, on Sunday, April 1, 2018. Mark Baker / AP Photo
England's Mark Stoneman (R) and teammate Alastair Cook walk onto the field during the second cricket Test match between New Zealand and England at Hagley Oval in Christchurch on March 30, 2018. Marty Melville / AFP
Alastair Cook of England looks dejected after being dismissed by Trent Boult of New Zealand during day one of the Second Test match between New Zealand and England at Hagley Oval on March 30, 2018 in Christchurch, New Zealand. Kai Schwoerer / Getty Images