diff --git a/crates/polars-plan/src/plans/optimizer/predicate_pushdown/mod.rs b/crates/polars-plan/src/plans/optimizer/predicate_pushdown/mod.rs
index dc0a9521d188..32fa0328fa7e 100644
--- a/crates/polars-plan/src/plans/optimizer/predicate_pushdown/mod.rs
+++ b/crates/polars-plan/src/plans/optimizer/predicate_pushdown/mod.rs
@@ -196,12 +196,7 @@ impl PredicatePushDown {
         let new_inputs = inputs
             .map(|node| {
                 let alp = lp_arena.take(node);
-                let alp = self.push_down(
-                    alp,
-                    init_hashmap(Some(acc_predicates.len())),
-                    lp_arena,
-                    expr_arena,
-                )?;
+                let alp = self.push_down(alp, init_hashmap(None), lp_arena, expr_arena)?;
                 lp_arena.replace(node, alp);
                 Ok(node)
             })
@@ -581,6 +576,12 @@ impl PredicatePushDown {
                 mut slice,
                 sort_options,
             } => {
+                let mut local_predicates = Vec::new();
+                if slice.is_some() && !acc_predicates.is_empty() {
+                    local_predicates = acc_predicates.into_values().collect();
+                    acc_predicates = init_hashmap(None);
+                }
+
                 if let Some((offset, len, None)) = slice
                     && by_column.len() == 1
                 {
@@ -600,7 +601,9 @@ impl PredicatePushDown {
                     slice,
                     sort_options,
                 };
-                self.pushdown_and_continue(lp, acc_predicates, lp_arena, expr_arena, true)
+                let lp =
+                    self.pushdown_and_continue(lp, acc_predicates, lp_arena, expr_arena, true)?;
+                Ok(self.optional_apply_predicate(lp, local_predicates, lp_arena, expr_arena))
             },
             lp @ Sink { .. } | lp @ SinkMultiple { .. } => {
                 self.pushdown_and_continue(lp, acc_predicates, lp_arena, expr_arena, false)
diff --git a/py-polars/tests/unit/lazyframe/test_predicates.py b/py-polars/tests/unit/lazyframe/test_predicates.py
index e5232ec39282..a27d71e7c662 100644
--- a/py-polars/tests/unit/lazyframe/test_predicates.py
+++ b/py-polars/tests/unit/lazyframe/test_predicates.py
@@ -1293,3 +1293,31 @@ def test_projection_pushed_past_join_26693() -> None:
     plan = a.filter(pl.col.y > 0).join(b, on="x").group_by("x").agg([]).explain()
 
     assert plan.index("simple π") > plan.index("INNER JOIN")
+
+
+def test_predicate_pushdown_sort_slice_26803() -> None:
+    df = pl.DataFrame({"rank": [1, 2, 3, 4, 5], "score": [10, 4, 6, 2, 8]})
+
+    for lazy, eager in [
+        (
+            df.lazy().sort("rank").head(3).filter(pl.col("rank") > 2),
+            df.sort("rank").head(3).filter(pl.col("rank") > 2),
+        ),
+        (
+            df.lazy().sort("rank").tail(3).filter(pl.col("rank") < 4),
+            df.sort("rank").tail(3).filter(pl.col("rank") < 4),
+        ),
+        (
+            df.lazy().sort("rank", descending=True).head(3).filter(pl.col("rank") < 4),
+            df.sort("rank", descending=True).head(3).filter(pl.col("rank") < 4),
+        ),
+        (
+            df.lazy().top_k(3, by="rank").filter(pl.col("rank") < 5),
+            df.top_k(3, by="rank").filter(pl.col("rank") < 5),
+        ),
+        (
+            df.lazy().bottom_k(3, by="rank").filter(pl.col("rank") > 1),
+            df.bottom_k(3, by="rank").filter(pl.col("rank") > 1),
+        ),
+    ]:
+        assert_frame_equal(lazy.collect(), eager, check_row_order=False)