Nike's ramped up its retros of Andre Agassi tennis shoes from the Air Tech Challenge line ever since it re-signed the man in 2013. The plucking of pairs from his back catalog continues in 2016 with the Air Tech Challenge 4, a model seen here in a new colorway.

The shoe combines grey and white uppers with hot pinks and reds and the sort of flashy graphics sneakerheads have come to expect from Agassi footwear.

Also on the way for the ATC 4 is this OG colorway.

This Nike Air Tech Challenge 4 has only hit a couple of shops in Europe so far, meaning that there's still a bit of a wait ahead for a U.S. release.

Nike Air Tech Challenge 4 Grey White Crimson Profile

Nike Air Tech Challenge 4 Grey White Crimson Medial

Nike Air Tech Challenge 4 Grey White Crimson Top

Nike Air Tech Challenge 4 Grey White Crimson Heel

Nike Air Tech Challenge 4 Grey White Crimson Sole