diff --git a/client/src/telethon/_impl/mtsender/sender.py b/client/src/telethon/_impl/mtsender/sender.py
index 0361c635..469b85db 100644
--- a/client/src/telethon/_impl/mtsender/sender.py
+++ b/client/src/telethon/_impl/mtsender/sender.py
@@ -158,9 +158,6 @@ class Request(Generic[Return]):
     state: RequestState
     result: Future[Return]
 
-    def __eq__(self, value: object) -> bool:
-        return self is value
-
 
 @dataclass
 class Sender:
@@ -441,17 +438,19 @@ class Sender:
             )
 
     def _pop_request(self, msg_id: MsgId) -> Optional[Request[object]]:
-        for req in self._requests:
+        for i, req in enumerate(self._requests):
             if isinstance(req.state, Serialized) and req.state.msg_id == msg_id:
                 raise RuntimeError("got response for unsent request")
             elif isinstance(req.state, Sent) and req.state.msg_id == msg_id:
-                self._requests.remove(req)
+                del self._requests[i]
                 return req
 
         return None
 
     def _drain_requests(self, msg_id: MsgId) -> Iterator[Request[object]]:
-        for req in self._requests:
+        for i in reversed(range(len(self._requests))):
+            req = self._requests[i]
+
             if isinstance(req.state, Serialized) and (
                 req.state.msg_id == msg_id or req.state.container_msg_id == msg_id
             ):
@@ -459,8 +458,7 @@ class Sender:
             elif isinstance(req.state, Sent) and (
                 req.state.msg_id == msg_id or req.state.container_msg_id == msg_id
             ):
-                self._requests.remove(req)
-                yield req
+                yield self._requests.pop(i)
 
     @property
     def auth_key(self) -> Optional[bytes]: