Everton lost to Espanyol in a pre-season friendly match at Goodison Park on Saturday.
Leonardo Baptistao’s early goal from the penalty spot proved to be the difference between the two sides at Goodison Park.
Koeman has taken to Twitter to give his reaction to Everton’s loss in their final pre-season friendly match.
Everton will kick off their 2016-17 Premier League campaign with a home match against Tottenham Hotspur next weekend.
The Toffees will head into the game against Tottenham at Goodison Park with confidence.
The Merseyside outfit have had a good pre-season, and fans should be optimistic about a successful 2016-17 campaign under Koeman.
Everton have been quite busy in the summer transfer window so far, signing Maarten Stekelenburg and Idrissa Gueye.
Tim Howard, Leon Osman and Tony Hibbert are among the players who have parted company with the Toffees so far in the summer transfer window.