Mauricio Pochettino’s side suffered a surprise 1-0 loss to Crystal Palace in the FA Cup fifth round last weekend after Martin Kelly’s winner at White Hart Lane.
However, Spurs bounced back on Thursday night with a confidence-restoring 3-0 win against Serie A side Fiorentina in the second leg of their Europa League last-16 tie.
The north London side have won their last five Premier League games thanks to victories over Sunderland, Norwich City, Crystal Palace, Watford and Manchester City.
Former Scotland international Gray is confident Pochettino’s side will make it six consecutive wins against the Swans at White Hart Lane on Sunday.
“There seems to be no stopping Spurs at the moment,” Gray told Paddy Power’s blog.
“They’ve got a young squad who seem determined and they’ got another good result during the week in the Europa League to set up a mouth-watering last 16 tie against Borussia Dortmund. They’re going to be right in this title race until the very end, and I don’t think Swansea have the quality to stop them on Sunday.”
Tottenham are in second place in the Premier League table and five points behind leaders Leicester City.
Spurs host Arsenal in the north London derby at White Hart Lane on 5 March.
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