Striker Fallon played a key role as Plymouth Argyle ended Huddersfield Town’s three-match winning streak with a 2-1 win while Smith put in a solid shift in the Ipswich Town back four as they took care of bottom division strugglers Northampton Town 3-1.
Fallon had a hand in both Plymouth goals as his little-and-large partnership with Bradley Wright-Phillips paid dividends to secure the Pilgrims just their second home win of the season.
Plymouth took the lead in the 16th minute when keeper David Button’s free-kick from deep inside his own half was headed on by recalled targetman Fallon and into the path of Wright-Phillips. The in-form striker wasted no time in making the best of it, clinically ramming home from just inside the area.
The Terriers levelled within two minutes but Fallon was back in the thick of the action in the 54th minute when he had what looked like a perfectly-legal headed effort ruled out for pushing.
The former Barnsley man was proving a handful and, in a route-one repeat of the opening goal, Button cleared long in the 66th minute for Fallon to head into the path of Wright-Phillips, who calmly slid the ball home for his seventh goal of the campaign.
Fallon’s New Zealand teammate Smith had a less eventful time of things against Northampton but played the full 90 minutes in a steady performance.
Liam Davis put Northampton in front with a stunning strike from long range against the run of play but Carlos Edwards levelled 10 minutes later with a fine finish after a defensive lapse by the Cobblers.
Damien Delaney put Ipswich in front from a Andros Townsend corner and a Tamas Priskin header late on made sure of their quarter-final place.