diff --git a/aiohttp/client.py b/aiohttp/client.py
index e270a7b0476..eb5cfa89da3 100644
--- a/aiohttp/client.py
+++ b/aiohttp/client.py
@@ -451,6 +451,7 @@ async def _request(
         auto_decompress: Optional[bool] = None,
         max_line_size: Optional[int] = None,
         max_field_size: Optional[int] = None,
+        middleware: Optional["Middleware"] = None,
     ) -> ClientResponse:
         # NOTE: timeout clamps existing connect and read timeouts.  We cannot
         # set the default to None because we need to detect if the user wants
@@ -658,6 +659,8 @@ async def _request(
                         max_field_size=max_field_size,
                     )
 
+                    # TODO: pre-request middleware
+
                     try:
                         try:
                             resp = await req.send(conn)
@@ -763,6 +766,8 @@ async def _request(
                         resp.release()
                         continue
 
+                    # TODO: post request middleware
+
                     break
 
             # check response status