“This matchup difficulty really depends on the riven player but I personally love this matchup, I start doran's blade always and play aggressive early, try to bait out rivens shield by auto attacking her and then go in for the E, also if she engages onto you it's very easy to hit your E, rivens are super telegraphed because of their kit. I play really aggressive pre 6 in this matchup and can usually get kills before then, level 6 is when you have to watch out because her burst with ultimate can be insane, if you haven't backed and have a lot of unspent gold or you're just low on HP I recommend backing and getting some HP because she can burst you from like 75% HP if you aren't careful and she's good at comboing, but you also have potential to outplay her but flashing her second part of ultimate. once you get cleaver and ninja tabi + level 9 you should almost always win the 1v1 unless you missplay, just remember try to bait out her E first with auto attacks because they will use it to shield auto attacks a lot.”
“A Skill matchup.
If you're able to parry her hard cc you win the trade. If she's able to bait out your parry she wins the trade.
 Tabis are a good buy.
*Important* Currently she's busted out of her god-damn mind and Riot refuses to nerf her so consider banning her if you're in High-Elo.
“Abuse her cooldowns. She can burst you quite quickly. At level 6 if you are low be careful as she can quickly catch up to you and just ult you to death. Very slippery so hard to kill early. If she misses her stun then try to fight her as she can't create distance as easily then.”
“Riven has a lot of gap closers to get to you. Her E completely nulls out your Q damage. This lane is all about cooldowns. When Riven uses her abilities, take advantage of her. Be very careful of her R when low because her slash is an execute. Play this lane safe early.”
“Skill matchup in your favor. Do not get near her at level 1. She beats you this early. Only engage at level 2 when you have a dash or stun. Baiting her Q will win you a trade, or you can get your damage off before she can use the full combo. She doesn't typically cling to her shield but if you can't wait it out, stun her and dash off. I've found Riven to be fairly divable if you make sure to either one shot her or bait her stun.”
“Most Riven matchups are very easy but some good Riven players may outplay you. Riven only does one type of damage so she's very easy to itemize against. Get a Frozen Heart and Ninja Tabi and she won't be able to do much against you. If you are having a hard time against a good Riven you can max W first. Don't use your Q unless you are hidden or she has used all of her dashes. Keep track of when she uses her dashes and look to fight her while they are on cooldown.”
“TL;DR - SKILL MATCHUP. FIGHT HER LEVEL 1 WITH W. CAREFUL OF HER BURST/ALL IN. RESPECT HER LEVEL 6 DAMAGE. TRY TO CANCEL HER Q WITH YOUR E. STEELCAPS ARE A GOOD BUY. CONQUEROR IS GOOD.
The Riven matchup is, obviously, HEAVILY dependent on how good the Riven is. But in general, your biggest priorities should be not underestimating her damage and not wasting your abilities because a good Riven will be able to take advantage. She is much harder to deal with when she has ignite so just try to be careful. You are stronger than her level 1 if you level your W so try to make use of this and heavily outtrade her. Try to trade against her when she wastes her abilities. If possible, use your E in order to cancel her third Q as this can leave her in a very vulnurable position. If you do not have your E, you can buffer your W to slow her down just as she knocks you up. This might not matter much in the end though, as she has a ton of mobility. Level 6 is tricky as you have to respect her ultimate. If she catches you off, she can kill you from full health quite easily. It is going to be quite tricky to land your Qs on her but doing so is the key to beating her. This is an extremely snowbally lane so try not to die. And if you do, try not to die any more to her as that would potentially render the game unwinnable. Steelcaps are an amazing purchase against her. Thanks to Conqueror giving more healing AND some Rivens opting for Ravenous/omnivamp items, Bramble Vest is another good pick up against her, especially if the rest of her team requires you to get Merc boots to survive in teamfights. Conqueror is good into her. However, the rune that allows you to dumpster her in lane is Aftershock.”
“Difficult to kill.
You are stronger 1v1 until mid game.
Prioritize denying CS rather than going for all-ins as she can escape most attempts.”
“Very mobile that can make it hard to land Q, but if her Q and E are down, make sure to punish her hard for it. You can outrade her early as long as you don't get hit by every single ability of hers.”
“Riven is one of those champs where she can all in you but its actually a close match up compare to Irelia or Wukong. Watch for her Abilities”