The supporters had to choose between Jason Scotland, Dorus De Vries, Ferrie Bodde, Garry Monk, Leon Britton and Angel Rangel as the final short list for the top award and Roberto admits it is not a decision he would have liked to have made.
The official winner will be announced this evening at an event attended by both players and management "We have got so many players who have been so consistent this season that I wouldn't be able to choose between them," said the Swansea manager.
"Never mind the six who are on the short list, there are nine or 10 players who could make strong cases for winning the award.
"The hardest thing in football is finding that consistency that means you can get results at home and away and when you're facing all kinds of challenges.
"But nine or 10 players have produced that for us this season and that's why we've been successful in League One.
"You could make a strong argument for all of them to win and I've never known a player-of-the-year award like it.
"It would be impossible for me to select one player because they've all done so well."