This is a mid-scaling juggernaut vs duelist lane where Garen must manage short trades and avoid extended fights.
Focus on denying Fiora easy vital access and avoid giving her isolated side-lane duels where she excels.
Trading pattern
Engage with (Q) to silence and follow with (E) for quick damage, then disengage before Fiora can retaliate with extended vitals.
Punish Fiora when her (W) parry is on cooldown by committing to short trades.
Avoid using (Q) when Fiora can easily disengage or reposition to vital spots, as this wastes your main engage tool.
Danger windows
Fiora is most dangerous when her (W) parry is available to block your (Q) silence or (E) damage.
Avoid extended trades after your (Q) cooldown is used, as you lack reach and Fiora can capitalize on vitals.
Be cautious post-level 6 when Fiora can force long duels with (R) and chase through vitals, especially if isolated.
Early game
Use early waves to set up short (Q)+(E) trades and back off to recover passive health.
Avoid extended trades before level 6 since (W) parry punishes predictable engages.
Pressure the wave enough to prevent Fiora from freely accessing vitals but don't overcommit to avoid being outpaced.
Power spikes
Level 6: Use (R) to execute low-health Fiora targets after chipping her down with short trades.
First bruiser/tank item: Repeat controlled trades to absorb more damage and leverage passive health regen.
Respect Fiora's level 6 (R) which enables her to chase through multiple vitals and sustain; avoid extended isolated duels post-6.
Win conditions
Win by consistently landing short (Q)+(E) trades to chip Fiora's health and trigger execute range for (R).
Deny Fiora access to vital procs by controlling spacing and wave state to reduce her dueling power.
Survive early pressure, build defensive items, and use your durability to outlast Fiora's burst and punish cooldowns before scaling into side-lane pressure.
Tip: For Garen vs Fiora, read overview, trading pattern, and danger windows first for a fast Top lane check.