Kelechi Iheanacho spared Leicester City from a potential FA Cup giant-killing once again as his second-half goal saw the Foxes beat fourth-tier Walsall 1-0 and progress to the fifth round on Saturday.
Leicester, who beat fourth-tier strugglers Gillingham by a single Iheanacho goal last time out, faced a stern test from a hard-working, high-energy Walsall side eager to shut out their top-flight opposition.
It took 30 minutes for the Foxes to get a shot on target, and a frustrating afternoon was made worse as Belgian midfielder Youri Tielemans' powerful effort from the penalty spot struck the post after Patson Daka was fouled inside the box.
But second-half substitute Iheanacho rescued Leicester's afternoon when his effort from the edge of the box took a wicked deflection off the back of Walsall defender Brandon Comley, turning it into a curling, dipping ball that proved too much for the goalkeeper to handle.
Fellow Premier League side Leeds United beat lower-division opposition in Saturday's other early game as they triumphed 3-1 over Accrington Stanley to reach the fifth round for the first time since 2016.
Goals from Junior Firpo and Luis Sinesterra after a stellar first-half Jack Harrison strike from distance saw Jesse Marsch's top-flight strugglers ease past League One Accrington, despite the hosts pulling one back late on through Leslie Adekoya.