When the NBA basketball combine begins Wednesday in Chicago, former Michigan forward Glenn Robinson III feels certain he will turn heads.

Robinson, accompanied by his mother, Shantelle, and grandmother Carolyn, was at the M Den Tuesday night signing posters, mugs, T-shirts and pictures, before heading to the combine that concludes Sunday.

Last month, the 6-foot-6 Robinson announced his early departure from Michigan after two seasons to head to the NBA. Nik Stauskas and Mitch McGary also are leaving the Wolverines for professional basketball.

Robinson has been working out in Indianapolis and also in Los Angeles with trainer Don MacLean. He said he has spent a great deal of time in Los Angeles working out with Gary Harris, the former Spartan, and T.J. Warren, formerly of North Carolina State.

“(Warren) is the best person I’ve guarded in a while,” Robinson said, as he described the one-on-one and two-on-two sessions with a number of players as intense and demanding, adding they’ve told him he causes mismatch problems.

He has spent an hour and a half each day on basketball and then an hour lifting weights. Robinson has focused on ballhandling and shooting.