The Red Devils and Blues were keeping a keen eye on youngster Leny Yoro of Lille.
The French side were taking on Le Havre in Ligue 1 over the weekend, going on to win 3-0.
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The Premier League sides were assessing whether Yoro is worthy of a summer move.
One who may have impressed those scouts is Lille's Jonathan David, who scored a hat-trick.
He ensured that Paulo Fonseca's side are in with a shot of Champions League qualification.