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Tottenham Hotspur will most likely take the fourth place in their next match and will wait four hours to see if Aston Villa will reclaim it but there will be a match difference between them.
This is temporarily obviously and by the end of the season I think Tottenham Hotspur will be fourth, followed by Aston Villa and Manchester United driven by the actual goals difference.
Of course, that's because Tottenham is believed to be able to win the match easily against Luton Town. I'm not too sure Tottenham can do it easily after their performance has been too bad recently, but the probability of Tottenham winning is certainly very high.
One advantage Tottenham has over Aston Villa is that Tottenham have 1 match in hand. So Tottenham will probably make good use of every match so that their chances of returning to the top 4 are better. Aston Villa have a lot of difficult games left in the season, so this will make their plans to stay in the top 4 difficult in my opinion.