diff --git a/spring-web/src/main/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConvention.java b/spring-web/src/main/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConvention.java
index b013567d59a..9e3244c7d4c 100644
--- a/spring-web/src/main/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConvention.java
+++ b/spring-web/src/main/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConvention.java
@@ -100,7 +100,8 @@ public class DefaultServerRequestObservationConvention implements ServerRequestO
 		if (context.isConnectionAborted()) {
 			return STATUS_UNKNOWN;
 		}
-		return (context.getResponse() != null) ? KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.STATUS, Integer.toString(context.getResponse().getStatusCode().value())) : STATUS_UNKNOWN;
+		return (context.getResponse() != null && context.getResponse().getStatusCode() != null) ?
+				KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.STATUS, Integer.toString(context.getResponse().getStatusCode().value())) : STATUS_UNKNOWN;
 	}
 
 	protected KeyValue uri(ServerRequestObservationContext context) {
@@ -112,7 +113,7 @@ public class DefaultServerRequestObservationConvention implements ServerRequestO
 				}
 				return KeyValue.of(ServerHttpObservationDocumentation.LowCardinalityKeyNames.URI, pattern.toString());
 			}
-			if (context.getResponse() != null) {
+			if (context.getResponse() != null && context.getResponse().getStatusCode() != null) {
 				HttpStatus status = HttpStatus.resolve(context.getResponse().getStatusCode().value());
 				if (status != null) {
 					if (status.is3xxRedirection()) {
@@ -141,7 +142,7 @@ public class DefaultServerRequestObservationConvention implements ServerRequestO
 		if (context.isConnectionAborted()) {
 			return HTTP_OUTCOME_UNKNOWN;
 		}
-		if (context.getResponse() != null) {
+		if (context.getResponse() != null && context.getResponse().getStatusCode() != null) {
 			return HttpOutcome.forStatus(context.getResponse().getStatusCode());
 		}
 		return HTTP_OUTCOME_UNKNOWN;
diff --git a/spring-web/src/test/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConventionTests.java b/spring-web/src/test/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConventionTests.java
index e2d5e8538dd..42afdf35c5d 100644
--- a/spring-web/src/test/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConventionTests.java
+++ b/spring-web/src/test/java/org/springframework/http/observation/reactive/DefaultServerRequestObservationConventionTests.java
@@ -141,6 +141,16 @@ class DefaultServerRequestObservationConventionTests {
 				.contains(KeyValue.of("http.url", "/test/resource"));
 	}
 
+	@Test
+	void supportsNullStatusCode() {
+		ServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/test/resource"));
+		ServerRequestObservationContext context = new ServerRequestObservationContext(exchange);
+
+		assertThat(this.convention.getLowCardinalityKeyValues(context))
+				.contains(KeyValue.of("status", "UNKNOWN"),
+						KeyValue.of("exception", "none"), KeyValue.of("outcome", "UNKNOWN"));
+	}
+
 	private static PathPattern getPathPattern(String pattern) {
 		PathPatternParser pathPatternParser = new PathPatternParser();
 		return pathPatternParser.parse(pattern);