Johnny Sexton to sit out Ireland's Six Nations clash with France

Fly-half failed stage of return-to-play protocol after head injuryConor Murray, James Ryan and Peter O’Mahony also absentAfter an exchange of words this week with one of his former doctors regarding his history with brain injury, Johnny Sexton has failed the latest stage of his return-to-play protocol and is out of Ireland’s team to entertain France on Sunday. He is one of four changes to the Ireland team that started last weekend’s defeat in Cardiff, with a further four to the bench.One of the incoming players, Iain Henderson, has been made captain in Sexton’s absence, replacing James Ryan, f…