Warburton sat out of Cardiff Blues' 24-14 European victory over London Irish at BT Sport Cardiff Arms Park on Saturday after picking up a few knocks while on international duty.
In his absence Warburton's fellow openside Josh Navidi has been moved to No.8 and has impressed - being named man of the match against the Exiles and also in their GUINNESS PRO12 victory over Benetton Treviso.
Ellis Jenkins and Macauley Cook have also shone on the flanks and Warburton insists he now has a selection headache ahead of the return fixture with London Irish this weekend.
"Sam has got through the weekend really well and got through a heavy session this morning, so he's looking good to play a part," Hammett told Wales Online.
"When you look at our loose forward trio over the last couple of weeks, they have been outstanding, led obviously by Josh Navidi.
"They have all played their part, so it's a tough decision, but it's better to have those ones than finding it easy."
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