Nigeria manager Augustin Eguavoen has labelled Newcastle and Chelsea as 'unprofessional' after Obafemi Martins and John Obi Mikel failed to appear for international duty.
Both players were expected to join up with the Super Eagles on Monday ahead of a friendly game against Ghana which will be held at Brentford's Griffin Park.
Eguavoen has been angered by the absence of the pair and is now threatening to involve Fifa after having his plans disrupted in the build-up to the friendly.
Whilst Newcastle have released a statement stating Martins is available for selection, Chelsea have claimed that Mikel is currently suffering a thigh strain that is likely to keep him out of action for two weeks.
However, Eguavoen is still furious about the pair going AWOL and has trained his sights on the two Premiership clubs.
"The first thing we heard was Monday morning when I was told both Chelsea and Newcastle don't want their players involved," said Eguavoen in the Daily Star.
"If that's the case, then they are being totally unprofessional. We won't take this lightly and will be informing Fifa about it.
"I've left messages on Obafemi's phone but it keeps going to voicemail. We'll take action if he doesn't turn up.
"If they don't want their guys playing for Nigeria then they should stop Frank Lampard playing for England and Ricardo Carvalho playing for Portugal.
"They should respect that Fifa has set aside this deadline. It's not like we are playing in Africa, it's in London."