diff --git a/abstract-pool.ts b/abstract-pool.ts
index 04d6cf9..19a60b2 100644
--- a/abstract-pool.ts
+++ b/abstract-pool.ts
@@ -78,14 +78,14 @@ export class AbstractSimplePool {
     for (let i = 0; i < relays.length; i++) {
       const url = normalizeURL(relays[i])
       if (!request.find(r => r.url === url)) {
-        request.push({ url, filter })
+        request.push({ url, filter: filter })
       }
     }
 
     return this.subscribeMap(request, params)
   }
 
-  subscribeMany(relays: string[], filters: Filter[], params: SubscribeManyParams): SubCloser {
+  subscribeMany(relays: string[], filter: Filter, params: SubscribeManyParams): SubCloser {
     params.onauth = params.onauth || params.doauth
 
     const request: { url: string; filter: Filter }[] = []
@@ -93,9 +93,8 @@ export class AbstractSimplePool {
     for (let i = 0; i < relays.length; i++) {
       const url = normalizeURL(relays[i])
       if (uniqUrls.indexOf(url) === -1) {
-        for (let f = 0; f < filters.length; f++) {
-          request.push({ url, filter: filters[f] })
-        }
+        uniqUrls.push(url)
+        request.push({ url, filter: filter })
       }
     }
 
@@ -105,6 +104,14 @@ export class AbstractSimplePool {
   subscribeMap(requests: { url: string; filter: Filter }[], params: SubscribeManyParams): SubCloser {
     params.onauth = params.onauth || params.doauth
 
+    const grouped = new Map<string, Filter[]>()
+    for (const req of requests) {
+      const { url, filter } = req
+      if (!grouped.has(url)) grouped.set(url, [])
+      grouped.get(url)!.push(filter)
+    }
+    const groupedRequests = Array.from(grouped.entries()).map(([url, filters]) => ({ url, filters }))
+
     if (this.trackRelays) {
       params.receivedEvent = (relay: AbstractRelay, id: string) => {
         let set = this.seenOn.get(id)
@@ -152,7 +159,7 @@ export class AbstractSimplePool {
 
     // open a subscription in all given relays
     const allOpened = Promise.all(
-      requests.map(async ({ url, filter }, i) => {
+      groupedRequests.map(async ({ url, filters }, i) => {
         let relay: AbstractRelay
         try {
           relay = await this.ensureRelay(url, {
@@ -163,7 +170,7 @@ export class AbstractSimplePool {
           return
         }
 
-        let subscription = relay.subscribe([filter], {
+        let subscription = relay.subscribe(filters, {
           ...params,
           oneose: () => handleEose(i),
           onclose: reason => {
@@ -171,7 +178,7 @@ export class AbstractSimplePool {
               relay
                 .auth(params.onauth)
                 .then(() => {
-                  relay.subscribe([filter], {
+                  relay.subscribe(filters, {
                     ...params,
                     oneose: () => handleEose(i),
                     onclose: reason => {
@@ -224,12 +231,12 @@ export class AbstractSimplePool {
 
   subscribeManyEose(
     relays: string[],
-    filters: Filter[],
+    filter: Filter,
     params: Pick<SubscribeManyParams, 'label' | 'id' | 'onevent' | 'onclose' | 'maxWait' | 'onauth' | 'doauth'>,
   ): SubCloser {
     params.onauth = params.onauth || params.doauth
 
-    const subcloser = this.subscribeMany(relays, filters, {
+    const subcloser = this.subscribeMany(relays, filter, {
       ...params,
       oneose() {
         subcloser.close('closed automatically on eose')
diff --git a/pool.test.ts b/pool.test.ts
index 458b573..57ebe83 100644
--- a/pool.test.ts
+++ b/pool.test.ts
@@ -35,14 +35,18 @@ test('removing duplicates when subscribing', async () => {
     priv,
   )
 
-  pool.subscribeMany(relayURLs, [{ authors: [pub] }], {
-    onevent(event: Event) {
-      // this should be called only once even though we're listening
-      // to multiple relays because the events will be caught and
-      // deduplicated efficiently (without even being parsed)
-      received.push(event)
+  pool.subscribeMany(
+    relayURLs,
+    { authors: [pub] },
+    {
+      onevent(event: Event) {
+        // this should be called only once even though we're listening
+        // to multiple relays because the events will be caught and
+        // deduplicated efficiently (without even being parsed)
+        received.push(event)
+      },
     },
-  })
+  )
 
   await Promise.any(pool.publish(relayURLs, event))
   await new Promise(resolve => setTimeout(resolve, 200)) // wait for the new published event to be received
@@ -55,12 +59,12 @@ test('same with double subs', async () => {
   let priv = generateSecretKey()
   let pub = getPublicKey(priv)
 
-  pool.subscribeMany(relayURLs, [{ authors: [pub] }], {
+  pool.subscribeMany(relayURLs, { authors: [pub] }, {
     onevent(event) {
       received.push(event)
     },
   })
-  pool.subscribeMany(relayURLs, [{ authors: [pub] }], {
+  pool.subscribeMany(relayURLs, { authors: [pub] }, {
     onevent(event) {
       received.push(event)
     },
@@ -168,7 +172,7 @@ test('query a bunch of events and cancel on eose', async () => {
   let events = new Set<string>()
 
   await new Promise<void>(resolve => {
-    pool.subscribeManyEose(relayURLs, [{ kinds: [0, 1, 2, 3, 4, 5, 6], limit: 40 }], {
+    pool.subscribeManyEose(relayURLs, { kinds: [0, 1, 2, 3, 4, 5, 6], limit: 40 }, {
       onevent(event) {
         events.add(event.id)
       },