diff --git a/src/reports/ExcelFile.cpp b/src/reports/ExcelFile.cpp
index 1e457ad..bc162a9 100644
--- a/src/reports/ExcelFile.cpp
+++ b/src/reports/ExcelFile.cpp
@@ -22,6 +22,27 @@ namespace platform {
         colorOdd = 0xDCE6F1;
         colorEven = 0xFDE9D9;
     }
+    lxw_worksheet* ExcelFile::createWorksheet(const std::string& name)
+    {
+        lxw_worksheet* sheet;
+        std::string suffix = "";
+        std::string efectiveName;
+        int num = 1;
+        // Create a sheet with the name of the model
+        while (true) {
+            efectiveName = name + suffix;
+            if (workbook_get_worksheet_by_name(workbook, efectiveName.c_str())) {
+                suffix = std::to_string(++num);
+            } else {
+                sheet = workbook_add_worksheet(workbook, efectiveName.c_str());
+                break;
+            }
+            if (num > 100) {
+                throw std::invalid_argument("Couldn't create sheet " + efectiveName);
+            }
+        }
+        return sheet;
+    }
 
     lxw_workbook* ExcelFile::getWorkbook()
     {
diff --git a/src/reports/ExcelFile.h b/src/reports/ExcelFile.h
index d7a77fc..a78b2e0 100644
--- a/src/reports/ExcelFile.h
+++ b/src/reports/ExcelFile.h
@@ -24,6 +24,7 @@ namespace platform {
         void boldBlue(); //set blue color for the bold styles
         void boldGreen(); //set green color for the bold styles
         void createStyle(const std::string& name, lxw_format* style, bool odd);
+        lxw_worksheet* createWorksheet(const std::string& name);
         void addColor(lxw_format* style, bool odd);
         lxw_format* efectiveStyle(const std::string& name);
         lxw_workbook* workbook;
diff --git a/src/reports/ReportExcel.cpp b/src/reports/ReportExcel.cpp
index 256bd11..01579bc 100644
--- a/src/reports/ReportExcel.cpp
+++ b/src/reports/ReportExcel.cpp
@@ -17,26 +17,7 @@ namespace platform {
             worksheet_set_column(worksheet, i, i, columns_sizes.at(i), NULL);
         }
     }
-    void ReportExcel::createWorksheet()
-    {
-        const std::string name = data["model"].get<std::string>();
-        std::string suffix = "";
-        std::string efectiveName;
-        int num = 1;
-        // Create a sheet with the name of the model
-        while (true) {
-            efectiveName = name + suffix;
-            if (workbook_get_worksheet_by_name(workbook, efectiveName.c_str())) {
-                suffix = std::to_string(++num);
-            } else {
-                worksheet = workbook_add_worksheet(workbook, efectiveName.c_str());
-                break;
-            }
-            if (num > 100) {
-                throw std::invalid_argument("Couldn't create sheet " + efectiveName);
-            }
-        }
-    }
+
 
     void ReportExcel::createFile()
     {
@@ -44,7 +25,8 @@ namespace platform {
             workbook = workbook_new((Paths::excel() + Paths::excelResults()).c_str());
         }
         if (worksheet == NULL) {
-            createWorksheet();
+            const std::string name = data["model"].get<std::string>();
+            worksheet = createWorksheet(name);
         }
         setProperties(data["title"].get<std::string>());
         formatColumns();
@@ -209,7 +191,8 @@ namespace platform {
     }
     void ReportExcel::create_classification_report(const json& result)
     {
-        auto matrix_sheet = workbook_add_worksheet(workbook, "classif_report");
+
+        auto matrix_sheet = createWorksheet("clf_report");
         lxw_worksheet* tmp = worksheet;
         worksheet = matrix_sheet;
         if (matrix_sheet == NULL) {
diff --git a/src/reports/ReportExcel.h b/src/reports/ReportExcel.h
index 740ac69..88af143 100644
--- a/src/reports/ReportExcel.h
+++ b/src/reports/ReportExcel.h
@@ -15,7 +15,6 @@ namespace platform {
     private:
         void formatColumns();
         void createFile();
-        void createWorksheet();
         void header() override;
         void body() override;
         void showSummary() override;