The boss said two games in quick succession took its toll...
Phil Brown said he was "not going to moan" as the Blues played out a 0-0 draw away at Swindon Town's County Ground.
The Southend boss was happy to see his side extend their unbeaten run to 13 games and keep a clean sheet in a game that only really sparked to life in the final 15 minutes.
"It could have gone either way, it was like a boxing match.
"Someone in the dressing room described it as a game of basketball, it was really end to end. There wasn't really any midfield structure to it in the second half.
"Swindon wanted to play open, expansive football. We want to play football and it just became end to end, and it was almost like a cup tie in the end."
Having played Charlton Athletic only 48 hours prior, Brown believed that fatigue played a huge factor in his side not picking up all three points in Wiltshire.
"We had fatigue in our legs, there was no doubt about it. The three midfielders who played today, their stats on Saturday (against Charlton) were unbelievable.
"All of them were in the high 13km bracket, which you would expect from the engine room, but to produce that 48 hours later is very, very difficult and a big ask.
"We had great chances, but they had a couple of chances as well so how it was 0-0 I'll never know."
Brown felt it was just "not meant to be" at the County Ground with all eyes now on the visit of league leaders Sheffield United next weekend.
"It wasn't meant to be today and if we're to do anything we needed to nick a late winner like many did on Friday and Saturday. But thirteen games without defeat and a clean sheet to boot, I'm not going to moan about it."
"Hopefully there will still be a full house next week against Sheffield United and we'll show the league leaders what we can do."