Samoa sevens captain Reupena Levasa admits fitting Tim Nanai Williams into their squad for the past three tournaments has been a challenge.
The Chiefs utility played a limited role for Samoa in last weekend's Wellington Sevens, having only joined his teammates 24 hours before the tournament began.
He also played in the Dubai and Port Elizabeth tournaments, with the Manu missing the Cup quarter finals at all three events.
Reupena Leavasa says Tim Nanai-Williams brings a lot of talent and experience to their squad but admits his fleeting appearances also created challenges.
"That's the difficult thing with us. [Do] we have enough time to work together with him, especially in our plays and in our moves. It's a difficult decision - especially [for] the Samoa Rugby Union and within our team, but we don't blame him. We have to give him a chance [with] the IRB rule to play in four legs to switch to the Samoa Rugby Union to play for the World Cup fifteen this year".
Tim Nanai-Williams is not in the Samoan team playing in Las Vegas this weekend but is expected to complete his eligibility requirements at the Glasgow Sevens in May.
Samoa have slipped to ninth in the World Series standings, after winning just one of six games in Wellington, and are in tough pool with Fiji, New Zealand and Wales this weekend.