Donald through to Match Play semis

England's Luke Donald booked his place in the semi-finals of the WGC-Accenture Match Play Championship in Tucson with a polished last-eight win over Ryan Moore.

The 33-year-old, who is searching for a first win on American soil for five years and who will go third in the world with a win in the competition, beat Moore 5&4 to send out an ominous warning to the remaining members of the field.