Champions Cup preview: Exeter’s Hogg heads to Glasgow to meet former club

• Munster seek to deny Racing 92 top spot in Pool Four• Leinster host Lyon, Toulouse travel to face ConnachtLeinster are already guaranteed to finish top of the pool and their focus is on securing a home draw in the quarter-finals with two points separating the five pool leaders going into the fifth round. Last season’s beaten finalists have picked close to their strongest available side for Sunday’s home match against Lyon, a game that will kick off at the same time as Northampton’s tussle with Treviso. The Saints have made nine changes for a match they need to win to have a chance of going t…