Men's Six Nations: Scotland v Ireland
Date: Sunday, 9 February Venue: Murrayfield Stadium, Edinburgh Kick-off: 15:00 GMT
Coverage: Watch on BBC One & BBC iPlayer; live on BBC Radio 5 Live, BBC Radio Scotland, BBC Radio Ulster & BBC Sounds; live text commentary on BBC Sport website
Serious knee injuries can be devastating for elite-level athletes, but Dan Sheehan never lost hope that he would make it back for Ireland's Six Nations defence during his six-month lay-off after rupturing an anterior cruciate ligament.
One of Ireland's standout performers in recent years, Sheehan suffered the injury in last summer's first Test against South Africa in Pretoria.