diff --git a/src/PhpSpreadsheet/Worksheet.php b/src/PhpSpreadsheet/Worksheet.php
index 652196644c..b1ad79975f 100644
--- a/src/PhpSpreadsheet/Worksheet.php
+++ b/src/PhpSpreadsheet/Worksheet.php
@@ -1449,7 +1449,7 @@ public function getStyle($pCellCoordinate = 'A1')
         $this->parent->setActiveSheetIndex($this->parent->getIndex($this));
 
         // set cell coordinate as active
-        $this->setSelectedCells(strtoupper($pCellCoordinate));
+        $this->setSelectedCells($pCellCoordinate);
 
         return $this->parent->getCellXfSupervisor();
     }
@@ -2420,18 +2420,10 @@ public function setSelectedCells($pCoordinate = 'A1')
     {
         // Uppercase coordinate
         $pCoordinate = strtoupper($pCoordinate);
-
-        // Convert 'A' to 'A:A'
-        $pCoordinate = preg_replace('/^([A-Z]+)$/', '${1}:${1}', $pCoordinate);
-
-        // Convert '1' to '1:1'
-        $pCoordinate = preg_replace('/^([0-9]+)$/', '${1}:${1}', $pCoordinate);
-
-        // Convert 'A:C' to 'A1:C1048576'
-        $pCoordinate = preg_replace('/^([A-Z]+):([A-Z]+)$/', '${1}1:${2}1048576', $pCoordinate);
-
-        // Convert '1:3' to 'A1:XFD3'
-        $pCoordinate = preg_replace('/^([0-9]+):([0-9]+)$/', 'A${1}:XFD${2}', $pCoordinate);
+        $search = ['/^([A-Z]+)$/', '/^([0-9]+)$/', '/^([A-Z]+):([A-Z]+)$/', '/^([0-9]+):([0-9]+)$/'];
+        $replace = ['${1}:${1}', '${1}:${1}', '${1}1:${2}1048576', 'A${1}:XFD${2}'];          
+        // Convert 'A' to 'A:A', '1' to '1:1', 'A:C' to 'A1:C1048576', '1:3' to 'A1:XFD3'
+        $pCoordinate = preg_replace($search, $replace, $pCoordinate);
 
         if (strpos($pCoordinate, ':') !== false || strpos($pCoordinate, ',') !== false) {
             list($first) = Cell::splitRange($pCoordinate);