Chelsea boss Rafa Benitez expects their season to conclude tomorrow. If the Blues draw at home and Arsenal score two more goals than them and win by the odd goal at Newcastle, then the rivals will be tied for third.
FA chiefs say a play-off will decide third place and the automatic Champions League qualification spot.
Benitez said: "I have not made any plans for a play-off because if we win on Sunday then there will be no need.
"But I have to consider all scenarios."