#nav_tennis{
    background-color: #f9f9f9;
    width: 100%;
    padding:10px 0px;
    margin-bottom:10px;
    height: 30px;
    border-bottom: 1px solid #e5e5e5;
    line-height: 30px;
}

#nav_tennis ul{
  width:960px;
  border:0px solid red;
  margin:auto;
  height:30px;
}

#nav_tennis ul li a{
  width:8%;
  display:block;
  float:left;
  margin-right:10px;
  border:1px solid #d5d5d5;
  border-radius:3px;
  font-size:14px;
  text-align:center;
}

.nav_tennis_on{
  color:#fff !important;
  background:#6a9251;
  border:1px solid #6a9251;
}

#nav_tennis a:hover{
  color:#6a9251;
  border:1px solid #6a9251;
}