diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
index 808020bed..7bf621b56 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/MongoRepository.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2021 the original author or authors.
+ * Copyright 2010-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,8 +19,9 @@ import java.util.List;
 
 import org.springframework.data.domain.Example;
 import org.springframework.data.domain.Sort;
+import org.springframework.data.repository.ListCrudRepository;
+import org.springframework.data.repository.ListPagingAndSortingRepository;
 import org.springframework.data.repository.NoRepositoryBean;
-import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.repository.query.QueryByExampleExecutor;
 
 /**
@@ -33,16 +34,8 @@ import org.springframework.data.repository.query.QueryByExampleExecutor;
  * @author Khaled Baklouti
  */
 @NoRepositoryBean
-public interface MongoRepository<T, ID> extends PagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
-
-	@Override
-	<S extends T> List<S> saveAll(Iterable<S> entities);
-
-	@Override
-	List<T> findAll();
-
-	@Override
-	List<T> findAll(Sort sort);
+public interface MongoRepository<T, ID>
+		extends ListCrudRepository<T, ID>, ListPagingAndSortingRepository<T, ID>, QueryByExampleExecutor<T> {
 
 	/**
 	 * Inserts the given entity. Assumes the instance to be new to be able to apply insertion optimizations. Use the
diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/ReactiveMongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/ReactiveMongoRepository.java
index a9c62a50a..5603f598c 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/ReactiveMongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/ReactiveMongoRepository.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2021 the original author or authors.
+ * Copyright 2016-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import org.springframework.data.domain.Example;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.repository.NoRepositoryBean;
 import org.springframework.data.repository.query.ReactiveQueryByExampleExecutor;
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
 import org.springframework.data.repository.reactive.ReactiveSortingRepository;
 
 /**
@@ -32,7 +33,8 @@ import org.springframework.data.repository.reactive.ReactiveSortingRepository;
  * @since 2.0
  */
 @NoRepositoryBean
-public interface ReactiveMongoRepository<T, ID> extends ReactiveSortingRepository<T, ID>, ReactiveQueryByExampleExecutor<T> {
+public interface ReactiveMongoRepository<T, ID>
+		extends ReactiveCrudRepository<T, ID>, ReactiveSortingRepository<T, ID>, ReactiveQueryByExampleExecutor<T> {
 
 	/**
 	 * Inserts the given entity. Assumes the instance to be new to be able to apply insertion optimizations. Use the
diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
index 5f4488dbc..f16c9a38e 100644
--- a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
+++ b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/SimpleMongoRepository.java
@@ -135,7 +135,7 @@ public class SimpleMongoRepository<T, ID> implements MongoRepository<T, ID> {
 	}
 
 	@Override
-	public Iterable<T> findAllById(Iterable<ID> ids) {
+	public List<T> findAllById(Iterable<ID> ids) {
 
 		Assert.notNull(ids, "The given Ids of entities not be null!");
 
diff --git a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/ConvertingReactiveMongoRepositoryTests.java b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/ConvertingReactiveMongoRepositoryTests.java
index f18bcbbab..55651839f 100644
--- a/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/ConvertingReactiveMongoRepositoryTests.java
+++ b/spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/ConvertingReactiveMongoRepositoryTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2021 the original author or authors.
+ * Copyright 2016-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,9 @@ import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.subscribers.TestSubscriber;
 import lombok.Data;
 import lombok.NoArgsConstructor;
+
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+import org.springframework.data.repository.reactive.RxJava3CrudRepository;
 import org.springframework.data.repository.reactive.RxJava3SortingRepository;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
@@ -222,12 +225,14 @@ public class ConvertingReactiveMongoRepositoryTests {
 //		assertThat(people).contains(carter, dave);
 //	}
 
-	interface ReactivePersonRepostitory extends ReactiveSortingRepository<ReactivePerson, String> {
+interface ReactivePersonRepostitory
+		extends ReactiveCrudRepository<ReactivePerson, String>, ReactiveSortingRepository<ReactivePerson, String> {
 
 		Publisher<ReactivePerson> findByLastname(String lastname);
 	}
 
-	interface RxJava3PersonRepostitory extends RxJava3SortingRepository<ReactivePerson, String> {
+	interface RxJava3PersonRepostitory
+			extends RxJava3CrudRepository<ReactivePerson, String>, RxJava3SortingRepository<ReactivePerson, String> {
 
 		io.reactivex.rxjava3.core.Flowable<ReactivePerson> findByFirstnameAndLastname(String firstname, String lastname);