Virgil van Dijk scored a stoppage time equaliser to deny Sunderland in a 1-1 draw at St Mary's.
Southampton boss says his players are "not stupid" and know they have to improve their mentality.
Koeman says Southampton are still in the fight for Europe despite losing their last two matches.
Arsene Wenger has made Arsenal a 'what if' club. It's an absolutely massive Winners and Losers...
Boss says Southampton lacked "belief, determination, character and mentality" on Tuesday.
Bournemouth moved eight points clear of the relegation zone with a 2-0 derby victory over Southampton.
"They try to play football, be creative and play offensively, and that's what I like," says the Southampton boss.
Spurs' superhuman physical and mental energy makes them winners while poor Mesut loses.
Branislav Ivanovic scored late to hand Chelsea a 2-1 victory against Southampton at St Mary's..
Ronald Koeman has acknowledged the "influence" Guus Hiddink has had on his managerial career.
Leicester and Spurs will be the most televised clubs in April and May. Just three sides will not be shown.
It’s been a Premier League campaign to forget for some. WhoScored.com reveal their lowest-rated XI...
After Flamini's excellent cameo against Barcelona, we look at eleven of the worst subs in club football.
United want Aubameyang, Icardi and Miranda. Aguero loves City IDST and Spurs lead Depoitre race
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