diff --git a/tests/fixtures/performance/checker/singletensor.py b/tests/fixtures/performance/checker/singletensor.py
new file mode 100644
index 0000000..0e1a6cb
--- /dev/null
+++ b/tests/fixtures/performance/checker/singletensor.py
@@ -0,0 +1,17 @@
+import torch
+import torch.nn as nn
+
+x = torch.ones((100, 100))
+model = nn.Sequential()
+
+
+# These should raise flags
+optimizer_adam = torch.optim.Adam(model.parameters())
+optimizer_sgd = torch.optim.SGD(model.parameters(), lr=0.01)
+optimizer_adamw = torch.optim.AdamW(model.parameters())
+
+# These should not raise flags
+optimizer_adam = torch.optim.Adam(model.parameters(), foreach=True)
+optimizer_sgd = torch.optim.SGD(model.parameters(), lr=0.01, foreach=True)
+optimizer_adamw = torch.optim.AdamW(model.parameters(), foreach=True)
+optimizer_adamw = torch.optim.AdamW(model.parameters(), foreach=False)
\ No newline at end of file
diff --git a/tests/fixtures/performance/checker/singletensor.txt b/tests/fixtures/performance/checker/singletensor.txt
new file mode 100644
index 0000000..8c4a847
--- /dev/null
+++ b/tests/fixtures/performance/checker/singletensor.txt
@@ -0,0 +1,3 @@
+9:18 TOR403 Deteced optimizer running with single tensor implementation. Please enable multi tensor implementation by passing 'foreach=True' into optimizer.
+10:17 TOR403 Deteced optimizer running with single tensor implementation. Please enable multi tensor implementation by passing 'foreach=True' into optimizer.
+11:19 TOR403 Deteced optimizer running with single tensor implementation. Please enable multi tensor implementation by passing 'foreach=True' into optimizer.
\ No newline at end of file
diff --git a/tests/fixtures/performance/checker/zerograd.py b/tests/fixtures/performance/checker/zerograd.py
index 8f0d6fc..9188224 100644
--- a/tests/fixtures/performance/checker/zerograd.py
+++ b/tests/fixtures/performance/checker/zerograd.py
@@ -3,7 +3,7 @@
 
 x = torch.ones((100, 100))
 model = nn.Sequential()
-optimizer = torch.optim.Adam(model.parameters())
+optimizer = torch.optim.Adam(model.parameters(),foreach=True)
 
 # This should raise flags
 optimizer.zero_grad(set_to_none=False)
diff --git a/torchfix/torchfix.py b/torchfix/torchfix.py
index 5e96e38..11c079c 100644
--- a/torchfix/torchfix.py
+++ b/torchfix/torchfix.py
@@ -22,6 +22,7 @@
     TorchVisionDeprecatedToTensorVisitor,
     TorchVisionSingletonImportVisitor,
     TorchGradNotSetToNonePatternVisitor,
+    TorchOptimizerSingleTensorPatternVisitor,
 )
 
 __version__ = "0.7.0"
@@ -45,6 +46,7 @@
     TorchVisionDeprecatedToTensorVisitor,
     TorchVisionSingletonImportVisitor,
     TorchGradNotSetToNonePatternVisitor,
+    TorchOptimizerSingleTensorPatternVisitor,
 ]
 
 
diff --git a/torchfix/visitors/__init__.py b/torchfix/visitors/__init__.py
index 45f2438..e2a9e3d 100644
--- a/torchfix/visitors/__init__.py
+++ b/torchfix/visitors/__init__.py
@@ -11,6 +11,7 @@
 from .performance import (
     TorchSynchronizedDataLoaderVisitor,
     TorchGradNotSetToNonePatternVisitor,
+    TorchOptimizerSingleTensorPatternVisitor,
 )
 from .security import TorchUnsafeLoadVisitor
 from .vision import (
@@ -34,4 +35,5 @@
     "TorchVisionDeprecatedToTensorVisitor",
     "TorchVisionSingletonImportVisitor",
     "TorchGradNotSetToNonePatternVisitor",
+    "TorchOptimizerSingleTensorPatternVisitor",
 ]
diff --git a/torchfix/visitors/performance/__init__.py b/torchfix/visitors/performance/__init__.py
index 0558af5..d9bac76 100644
--- a/torchfix/visitors/performance/__init__.py
+++ b/torchfix/visitors/performance/__init__.py
@@ -65,3 +65,41 @@ def visit_Call(self, node):
                         error_code=self.ERRORS[0].error_code,
                         message=self.ERRORS[0].message(),
                     )
+
+
+class TorchOptimizerSingleTensorPatternVisitor(TorchVisitor):
+    """
+    Reimplementation of OptimizerSingleTensorPattern from
+    https://github.com/pytorch/pytorch/blob/main/torch/profiler/_pattern_matcher.py
+    """
+
+    ERRORS = [
+        TorchError(
+            "TOR403",
+            (
+                "Deteced optimizer running with single tensor implementation. "
+                "Please enable multi tensor implementation by passing 'foreach=True' "
+                "into optimizer."
+            ),
+        )
+    ]
+
+    optimizers_with_foreach = ["Adam", "SGD", "AdamW"]
+
+    def visit_Call(self, node):
+
+        qualified_name = self.get_qualified_name_for_call(node)
+
+        for optimizer in self.optimizers_with_foreach:
+
+            if qualified_name and qualified_name.endswith(f"{optimizer}"):
+
+                foreach_arg = self.get_specific_arg(node, arg_name="foreach", arg_pos=1)
+
+                if foreach_arg is None:
+
+                    self.add_violation(
+                        node,
+                        error_code=self.ERRORS[0].error_code,
+                        message=self.ERRORS[0].message(),
+                    )