Portsmouth are hoping to clinch the signing of 25-year-old Dynamo Moscow striker Dmitri Bulykin before the FA Cup visit to Southampton.
Pompey boss Velimir Zajec is also attempting to add three Greek players during the transfer window.
Zajec has been in Athens trying to piece together a deal to sign AEK midfielder Kostas Katsouranis.
Egaleo defender Yorgos Alexopoulos and Panathinaikos keeper Konstantinos Chalkias are also on Pompey's list.
Pompey's midfield has been weakened by the sale of Nigel Quashie to Saints and Amdy Faye to Newcastle and Zajec is keen to boost his squad before the transfer window closes on Monday to avoid Pompey slipping into the relegation dogfight.
Katsouranis was an integral part of Greece's Euro 2004 triumph
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Former Panatinaikos director of football Zajec's number one target is Greece international Angelos Bassinas, but the Pompey boss's old club are unwilling to part company with him until the end of the season.
Katsouranis was an integral part of Greece's Euro 2004 triumph, playing in all six games in the finals in Portugal.
Chalkias has won four caps and proved a valuable back-up to Greece number one Antonios Nikopolidis.