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Steve Harmison has struggled with the white ball for 12 months
Steve Harmison is confident his decision to retire from one-day cricket will help prolong his Test career.
"This has been a difficult decision but I want to play at the highest level for as long as I can," he said.
"I believe that concentrating solely on Test cricket is the best way forward for me during the next phase of what will hopefully be a long career."
Harmison, 28, has played 46 ODIs since 2002 but has struggled to replicate his better Test form in 50-over cricket.
Steve Harmison has struggled with the white ball for 12 months
Steve Harmison is confident his decision to retire from one-day cricket will help prolong his Test career.
"This has been a difficult decision but I want to play at the highest level for as long as I can," he said.
"I believe that concentrating solely on Test cricket is the best way forward for me during the next phase of what will hopefully be a long career."
Harmison, 28, has played 46 ODIs since 2002 but has struggled to replicate his better Test form in 50-over cricket.