New Hull recruit Michael Crocker is one of a number of players bound for Super League whose arrival is being held up by visa problems.
The Australian international second rower was expected in England before the new year but is still in Australia waiting for his visa.
He was due to start training last Friday and is now hoping to get the paperwork through in time to join the Airlie Birds for their pre-season training camp in Portugal which starts on Thursday.
Crocker, 28, and his agent are working with the British Embassy in a bid to end the hold-up.
Crocker is not the only high-profile overseas player to be affected by a new system of visa-applications adopted by the Home Office last April.
The arrival of St Helens' signing from Penrith Panthers, Tony Puletua, has also been delayed but he is due to land in time to join his new team-mates on their pre-season camp in Portugal later this week.
Canberra Raiders stand-off Todd Carney, on the other hand, may be struggling to arrive in time for Huddersfield's opening game next month as he waits for his work permit.
The 22-year-old was sacked by his Australian club last year after a series of off-the-field incidents.
Huddersfield coach Nathan Brown said: "There are a fair few players stuck in Australia, and Toddy Carney is one of them. It's just sit and wait, but I'm confident he'll get here eventually."
The Giants are also waiting for the return of former New Zealand Test centre Jamahl Lolesi, who is trying to renew his visa.
New Zealand international Greg Eastwood, a member of the Kiwis' World Cup-winning team in November, had intended to join up with Leeds before Christmas but is still in Brisbane waiting for the paperwork to be processed.

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| Time | Result |
|---|---|
| Engage Super League | |
| Saturday 10th October | |
| Leeds 18 - 10 St Helens | |
| Saturday 3rd October | |
| St Helens 14 - 10 Wigan | |
| Friday 2nd October | |
| Leeds 27 - 20 Catalans Dragons | |
| Saturday 26th September | |
| Hull K R 16 - 30 Wigan | |
| Friday 25th September | |
| Huddersfield 6 - 16 Catalans Dragons | |
| Sunday 20th September | |
| Wigan 18 - 12 Castleford | |
| Saturday 19th September | |
| St Helens 15 - 2 Huddersfield | |
| Wakefield 16 - 25 Catalans Dragons | |
| Friday 18th September | |
| Leeds 44 - 8 Hull K R | |
| Sunday 13th September | |
| Castleford 35 - 22 Celtic Crusaders | |
England new-boy Tom Briscoe is a 33/1 shot with Sky Bet to top Four Nations try-scorer charts.
Phil Clarke says that England have to improve their defence if they are to challenge in the Four Nations.
Wales clinched the rugbyleague.com European Cup for the first time in 14 years with a 28-16 win over Scotland.
Kyle Eastmond believes England can beat Australia in the Gillette Four Nations final after their 20-12 win over New Zealand.
Peter Fox scored two tries as England reached the Gillette Four Nations final with a 20-12 victory over New Zealand.
Peter Fox was delighted with his two-try display as England reached the Four Nations final with a 20-12 success over New Zealand.
Australia secured a place in the Gillette Four Nations final with a 42-4 victory over France.