David Luiz "hopes" Angel Di Maria will join him at Paris St-Germain, describing the Manchester United man as "one of the best players in the world".
Di Maria, a £59.7m buy from Real Madrid last summer, has failed to join United's pre-season tour and Louis van Gaal admits he has "no idea" of the whereabouts of the Argentine BBC Sport reports.
PSG manager Laurent Blanc has said a deal for Di Maria, 27, is close.
Speaking after PSG beat United 2-0 in a friendly in Chicago, Luiz added: "I hope to see him. He is a great friend, a great player."
Manchester United broke the British transfer record to bring Di Maria to Old Trafford.
But after a promising start to his United career the 27-year-old began to struggle with injury, fatigue and a lack of form.
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