At one stage in the final round, Senden was just two shots off the lead. However, poor close-range putting - which he struggled with all week - ensured he wouldn't become a serious threat to Wagner.
Senden missed 11 putts inside 3m and made just three of the 17 he had between 3 and 4.5m.
His final round started steadily enough with two pars but his putting woes started on the third hole when, despite an impressive chip to within 1.5m, he pushed the putt wide for a bogey.
The Queenslander fired back with a 7.3m birdie putt on the very next hole but failed to get up and down from a greenside trap on the fifth to drop another shot.
A 6m eagle chance on the ninth slid past but the resulting birdie and another from 3.9m on the 10th gave hope a late charge was possible.
However, a bungled chip on the par-three 11th eventually led to another bogey and, although the leaders were faltering, it would make life tough.
"I lost momentum on the front nine," Senden admitted.
- AAP
