According to Dutch TV station Omroep West, Celtic have sent scouts to watch giant Dutch striker Michiel Kramer ahead of a possible summer move.
Celtic have already brought in Nadir Ciftci from Dundee United earlier this summer, but with doubts over the future of Stefan Scepovic, Bhoys manager Ronny Deila may need another centre forward.
A target man figure may be on Deila's wish list, and Kramer, 26, stands at a giant 6ft 5in tall - and just had the best season of his career so far.
The ADO Den Haag star hit 17 goals in 32 appearances last term, and could now leave the Eredivisie side, with Celtic seemingly interested.
Omroep West report that Celtic watched Kramer in action during the pre-season friendly against Greek side Veria FC, in something of a surprise move.
Friendly games aren't enough to assess a player given the lack of competitive nature, but with Omroep West adding that Kramer's transfer to Baniyas fell through earlier this week, it's likely that Celtic have watched Kramer before and are merely checking up on the player again due to his new availability.
Kramer has great strength, and uses his huge frame to great effect inside the penalty area, scoring a number of headed goals during his time with Den Haag.
He is more than just a target man though, possessing good footwork and superb predatory instincts inside the penalty area - no doubt why Celtic are pursuing him.