Jared Payne has told Ulster's PRO12 rivals that there is still more to come from his side despite their table-topping status at this early stage of the season.
Ahead of taking on the Ospreys at Kingspan Stadium ton Saturday evening, Les Kiss' men have won four from four to start a campaign for the first time since 2012 and will be expected to maintain a 100% record against the Welsh visitors.
Despite the impressive start, Payne says there is plenty of room for improvement.
"Even though we're winning we're still looking to get better," he said. "There's been some good things and some bad things that we've addressed. Hopefully we're working towards something a bit better. You never want to think you're top dog or you've made it."