Eastern historians, like their Western counterparts, have not always agreed on the importance of the battle. According to Bernard Lewis, "The Arab historians, if they mention this engagement Battle of Tours at all, present it as a minor skirmish," and Gustave von Grunebaum writes: "This setback may have been important from the European point of view, but for Muslims at the time, who saw no master plan imperiled thereby, it had no further significance." Contemporary Arab and Muslim historians and chroniclers were much more interested in the second Umayyad siege of Constantinople in 718, which ended in a disastrous defeat.