diff --git a/ethclient/ethclient.go b/ethclient/ethclient.go
index 352e6abc2c..9d0e0d5b52 100644
--- a/ethclient/ethclient.go
+++ b/ethclient/ethclient.go
@@ -131,7 +131,7 @@ func (ec *Client) BlockReceipts(ctx context.Context, blockNrOrHash rpc.BlockNumb
 }
 
 type rpcBlock struct {
-	Hash         common.Hash         `json:"hash"`
+	Hash         *common.Hash        `json:"hash"`
 	Transactions []rpcTransaction    `json:"transactions"`
 	UncleHashes  []common.Hash       `json:"uncles"`
 	Withdrawals  []*types.Withdrawal `json:"withdrawals,omitempty"`
@@ -158,6 +158,12 @@ func (ec *Client) getBlock(ctx context.Context, method string, args ...interface
 	if err := json.Unmarshal(raw, &body); err != nil {
 		return nil, err
 	}
+	// Pending blocks don't return a block hash, compute it for sender caching.
+	if body.Hash == nil {
+		tmp := head.Hash()
+		body.Hash = &tmp
+	}
+
 	// Quick-verify transaction and uncle lists. This mostly helps with debugging the server.
 	if head.UncleHash == types.EmptyUncleHash && len(body.UncleHashes) > 0 {
 		return nil, errors.New("server returned non-empty uncle list but block header indicates no uncles")
@@ -199,7 +205,7 @@ func (ec *Client) getBlock(ctx context.Context, method string, args ...interface
 	txs := make([]*types.Transaction, len(body.Transactions))
 	for i, tx := range body.Transactions {
 		if tx.From != nil {
-			setSenderFromServer(tx.tx, *tx.From, body.Hash)
+			setSenderFromServer(tx.tx, *tx.From, *body.Hash)
 		}
 		txs[i] = tx.tx
 	}
diff --git a/ethclient/ethclient_test.go b/ethclient/ethclient_test.go
index 29e311c1b4..8e70177944 100644
--- a/ethclient/ethclient_test.go
+++ b/ethclient/ethclient_test.go
@@ -307,6 +307,12 @@ func testTransactionInBlock(t *testing.T, client *rpc.Client) {
 	if tx.Hash() != testTx2.Hash() {
 		t.Fatalf("unexpected transaction: %v", tx)
 	}
+
+	// Test pending block
+	_, err = ec.BlockByNumber(context.Background(), big.NewInt(int64(rpc.PendingBlockNumber)))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 }
 
 func testChainID(t *testing.T, client *rpc.Client) {
@@ -619,6 +625,21 @@ func testAtFunctions(t *testing.T, client *rpc.Client) {
 	if gas != 21000 {
 		t.Fatalf("unexpected gas limit: %v", gas)
 	}
+
+	// Verify that sender address of pending transaction is saved in cache.
+	pendingBlock, err := ec.BlockByNumber(context.Background(), big.NewInt(int64(rpc.PendingBlockNumber)))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	// No additional RPC should be required, ensure the server is not asked by
+	// canceling the context.
+	sender, err := ec.TransactionSender(newCanceledContext(), pendingBlock.Transactions()[0], pendingBlock.Hash(), 0)
+	if err != nil {
+		t.Fatal("unable to recover sender:", err)
+	}
+	if sender != testAddr {
+		t.Fatal("wrong sender:", sender)
+	}
 }
 
 func testTransactionSender(t *testing.T, client *rpc.Client) {
@@ -640,10 +661,7 @@ func testTransactionSender(t *testing.T, client *rpc.Client) {
 
 	// The sender address is cached in tx1, so no additional RPC should be required in
 	// TransactionSender. Ensure the server is not asked by canceling the context here.
-	canceledCtx, cancel := context.WithCancel(context.Background())
-	cancel()
-	<-canceledCtx.Done() // Ensure the close of the Done channel
-	sender1, err := ec.TransactionSender(canceledCtx, tx1, block2.Hash(), 0)
+	sender1, err := ec.TransactionSender(newCanceledContext(), tx1, block2.Hash(), 0)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -662,6 +680,13 @@ func testTransactionSender(t *testing.T, client *rpc.Client) {
 	}
 }
 
+func newCanceledContext() context.Context {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	<-ctx.Done() // Ensure the close of the Done channel
+	return ctx
+}
+
 func sendTransaction(ec *ethclient.Client) error {
 	chainID, err := ec.ChainID(context.Background())
 	if err != nil {