Walsall and Grimsby Town were unable to find a way through at the Pallet-Track Bescot Stadium, the two sides playing out a goalless draw on the second matchday of the League Two season.
Walsall had the better of the chances, out-shooting the visitors 15 to 12 (two efforts on target to one) and edging possession 52.2% to 47.8%, while also winning the corner count eight to seven, but neither side's forward line could turn that territory into a goal.
Grimsby's Jayden Sweeney was the first player cautioned, booked in the 67th minute, with Walsall's James Connolly following him into the book six minutes later.
Walsall's Reece Smith replaced Andy Dallas in the 63rd minute, before Grimsby sent on Iwan Morgan for Andy Cook in the 69th. Walsall made a triple change in the 79th minute, sending on Charlie Crew, Rico Browne and Tai Sodje for Isaac Moore, Elicha Ahui and Lewis Simper, with Grimsby's Ryley Reynolds replacing Cian Doyle at the same point. Albert Adomah completed Walsall's changes, on for Courtney Clarke in the 89th.