The Bonus Points
His cross for the Saints' opening goal was one of three key passes he supplied in Sunday's contest, with a trio of successful tackles also helping the right-back top score with 40 in the Bonus Points System (BPS).
James Ward-Prowse (£5.0m) converted Soares' cross for Southampton's opener. That goal, along with 14 recoveries, earned the midfielder 33 in the BPS and two additional points.
Saints produced a clean sweep in Sunday's win, with three players sharing a BPS total of 24 to earn a single bonus point each.
Left-back Ryan Bertrand (£5.4m) completed 80% of his 61 passes, creating two chances for team-mates, while Dusan Tadic (£7.0m) also provided two key passes, in addition to a converted penalty for Southampton's third goal.
Meanwhile, goalkeeper Fraser Forster (£5.1m) made two saves and seven recoveries to pick up his first bonus point of the campaign.
The ICT Index
Tadic's performance was recognised in the ICT Index as he top scored with a tally of 12.0.
The Serbia international provided nine crosses and 18 successful passes in the attacking third to record 39 for Creativity.
Jay Rodriguez (£6.3m) recorded the highest Threat score on display at St Mary's; his total of 60 comprised three efforts on goal, all from inside the Foxes' penalty area.
The Scout Notes
Soares' 12-point haul, allied with Southampton's first clean sheet since Gameweek 16, will revive FPL interest in the full-back.
Rotation in Claude Puel's squad is still a concern, however, with the Saints facing two domestic cup ties before a Gameweek 23 trip to Swansea City.
Maya Yoshida (£4.2m) also continues to offer an even cheaper route into Puel's defence, as he made a seventh consecutive start in all competitions.
However, with Virgil van Dijk (£5.8m) suffering an ankle injury in Sunday's victory, there could now be doubts surrounding Saints' clean-sheet prospects for the visit to Liberty Stadium.
In attack, the form of Rodriguez, Tadic and Ward-Prowse requires monitoring over the coming Gameweeks.
The latter has started four of the last five outings and created nine chances over that run - more than any other Southampton asset.
Tadic earned his first 90 minutes since Gameweek 8 in Sunday's win and tops the Saints' ranks for chances created over the season (36), while he is second only to Nathan Redmond (£5.8m) for efforts on goal (38).
Rodriguez could emerge as the key asset once the Southampton schedule clears and the rotation with Shane Long (£6.1m) in the central striker role is calmed.
Having largely overlooked them as a source of points so far this season, FPL managers have been given little reason to reassess Claudio Ranieri's Leicester City.
A Gameweek 23 trip to Burnley provides a stern test and, with both Manchester United and Liverpool due next at the King Power Stadium, their prospects appear limited.