Town Boss Phil Brown is still hopeful of adding two more "top quality players" to his squad before the big kick-off on August 4th.
The Reds have signed seven new players so far this summer, including the recent additions of Jak McCourt and Toumani Diagouraga, but the Boss is on the lookout for more.
"We're still very, very short defensively so whether it is just a defender or two or two centre-halves, I don't know," Brown told swindontownfc.co.uk.
"They are the next line of enquiries.
"There is nothing better than maybe a good performance or a good result and the word spreading about the way we have approached this pre-season and the way we have played against West Brom and then all of a sudden against Portsmouth for advertising for someone to come and join us.
"Everyone in the outside world thinks we're one of the biggest clubs in the division and we've got to prove that.
"The only way to prove that is being able to field top quality players and that is what the attraction of Swindon Town Football Club is.
"Hopefully we will have two more top quality players that will come into the ranks before August 4th."
And the Gaffer revealed that he is also close to bringing in a new Goalkeeping Coach to replace Dean Thornton, who recently departed for the Taiwan National Team.
"I'm interviewing four people for the Goalkeeping Coach position and hopefully we can announce that before the start of the season, instead of Luke McCormick working with Lawrence Vigouroux and Will Henry," he added.
"He can then go back into that pack and be competition for places for Vigs.
"The backroom staff will be more or less done once we bring a Goalkeeping Coach in and that in itself is a big part of my jigsaw."