Watch: McIlroy working on swing changes
Four-time major champion tweaks swing after winless 2017.
Rory McIlroy is working on getting his club shaft more upright in the backswing during his off-season in Dubai.
The four-time major champion did not claim a victory this year, which is a first since 2008.
The Northern Irishman often spends his downtime in Dubai working on his swing and testing equipment.
