Directed Graphs and Network Flows · Easy problem

Five teams play a round robin, with results $1\to2$, $2\to3$, $3\to1$, $1\to4$, $4\to2$, $3\to4$, $1\to5$, $5\to2$, $5\to3$, $4\to5$ (arrow from winner to loser). What is the second-highest score (number of wins) among the five teams?