"Everyone says it's a blessing (for London Wasps players) that he's the coach, but it's not," Sackey told BBC Sport.
"If he picks some of the Wasps boys, it's like he is being biased. But he will pick players only on performance.
"It's nice that he is there - he's my coach - but on the flip side, people can get on his back about picking players who he knows a lot about.
"It's a hard one for him too, so it can work both ways."
The former London Irish speedster, who is one of nine Wasps players in Martin Johnson's Elite Player Squad, has been out of action since the Guinness Premiership Final but featured in the pre-season clash with Llanelli Scarlets last Friday.
However, having insisted that the only way into the Lions set-up is through form alone, Sackey is determined to impress for his club before attempting to do the same for his country.
"My target was the third game of the season and I've played a friendly, so I'll take it from there.
"My next target is to get fit and play for Wasps.
"When I'm doing that and playing well and I get picked for the England team, then my next job is to think about what I'm going to do with England."